System for in vitro transposition

ABSTRACT

A system for in vitro transposition includes a donor DNA that includes a transposable element flanked by a pair of bacterial transposon Tn5 outside end repeat sequences, a target DNA into which the transposable element can transpose, and a modified Tn5 transposase having higher binding avidity to the outside end repeat sequences and being less likely to assume an inactive multimer form than wild type Tn5 transposase.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

This invention was made with United States government support awarded by the following agencies: NIH Grant No. GM50692 and NSF Grant No. MCB-9419784. The United States has certain rights in this invention.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is a continuation-in-part of a patent application entitled "System for In Vitro Transposition," U.S. Ser. No. 08/814,877 filed Sep. 9, 1996.

BACKGROUND OF THE INVENTION

The present invention relates generally to the field of transposable nucleic acid and, more particularly to production and use of a modified transposase enzyme in a system for introducing genetic changes to nucleic acid.

Transposable genetic elements are DNA sequences, found in a wide variety of prokaryotic and eukaryotic organisms, that can move or transpose from one position to another position in a genome. In vivo, intra-chromosomal transpositions as well as transpositions between chromosomal and non-chromosomal genetic material are known. In several systems, transposition is known to be under the control of a transposase enzyme that is typically encoded by the transposable element. The genetic structures and transposition mechanisms of various transposable elements are summarized, for example, in "Transposable Genetic Elements" in "The Encyclopedia of Molecular Biology," Kendrew and Lawrence, Eds., Blackwell Science, Ltd., Oxford (1994), incorporated herein by reference.

In vitro transposition systems that utilize the particular transposable elements of bacteriophage Mu and bacterial transposon Tn10 have been described, by the research groups of Kiyoshi Mizuuchi and Nancy Kleckner, respectively.

The bacteriophage Mu system was first described by Mizuuchi, K., "In Vitro Transposition of Bacteria Phage Mu: A Biochemical Approach to a Novel Replication Reaction," Cell:785-794 (1983) and Craigie, R. et al., "A Defined System for the DNA Strand-Transfer Reaction at the Initiation of Bacteriophage Mu Transposition: Protein and DNA Substrate Requirements," P.N.A.S. U.S.A. 82:7570-7574 (1985). The DNA donor substrate (mini-Mu) for Mu in vitro reaction normally requires six Mu transposase binding sites (three of about 30 bp at each end) and an enhancer sequence located about 1 kb from the left end. The donor plasmid must be supercoiled. Proteins required are Mu-encoded A and B proteins and host-encoded HU and IHF proteins. Lavoie, B. D, and G. Chaconas, "Transposition of phage Mu DNA," Curr. Topics Microbiol. Immunol. 204:83-99 (1995). The Mu-based system is disfavored for in vitro transposition system applications because the Mu termini are complex and sophisticated and because transposition requires additional proteins above and beyond the transposase.

The Tn10 system was described by Morisato, D. and N. Kleckner, "Tn10 Transposition and Circle Formation in vitro," Cell 51:101-111 (1987) and by Benjamin, H. W. and N. Kleckner, "Excision Of Tn10 from the Donor Site During Transposition Occurs By Flush Double-Strand Cleavages at the Transposon Termini," P.N.A.S. U.S.A. 89:4648-4652 (1992). The Tn10 system involves the a supercoiled circular DNA molecule carrying the transposable element (or a linear DNA molecule plus E. coli IHF protein). The transposable element is defined by complex 42 bp terminal sequences with IHF binding site adjacent to the inverted repeat. In fact, even longer (81 bp) ends of Tn10 were used in reported experiments. Sakai, J. et al., "Identification and Characterization of Pre-Cleavage Synaptic Complex that is an Early Intermediate in Tn10 transposition," E.M.B.O. J. 14:4374-4383 (1995). In the Tn10 system, chemical treatment of the transposase protein is essential to support active transposition. In addition, the termini of the Tn10 element limit its utility in a generalized in vitro transposition system.

Both the Mu- and Tn10-based in vitro transposition systems are further limited in that they are active only on covalently closed circular, supercoiled DNA targets. What is desired is a more broadly applicable in vitro transposition system that utilizes shorter, more well defined termini and which is active on target DNA of any structure (linear, relaxed circular, and supercoiled circular DNA).

BRIEF SUMMARY OF THE INVENTION

The present invention is summarized in that an in vitro transposition system comprises a preparation of a suitably modified transposase of bacterial transposon Tn5, a donor DNA molecule that includes a transposable element, a target DNA molecule into which the transposable element can transpose, all provided in a suitable reaction buffer.

The transposable element of the donor DNA molecule is characterized as a transposable DNA sequence of interest, the DNA sequence of interest being flanked at its 5'- and 3'-ends by short repeat sequences that are acted upon in trans by Tn5 transposase.

The invention is further summarized in that the suitably modified transposase enzyme comprises two classes of differences from wild type Tn5 transposase, where each class has a separate measurable effect upon the overall transposition activity of the enzyme and where a greater effect is observed when both modifications are present. The suitably modified enzyme both (1) binds to the repeat sequences of the donor DNA with greater avidity than wild type Tn5 transposase ("class (1) mutation") and (2) is less likely than the wild type protein to assume an inactive multimeric form ("class (2) mutation"). A suitably modified Tn5 transposase of the present invention that contains both class (1) and class (2) modifications induces at least about 100-fold (±10%) more transposition than the wild type enzyme, when tested in combination in an in vivo conjugation assay as described by Weinreich, M. D., "Evidence that the cis Preference of the Tn5 Transposase is Caused by Nonproductive Multimerization," Genes and Development 8:2363-2374 (1994), incorporated herein by reference. Under optimal conditions, transposition using the modified transposase may be higher. A modified transposase containing only a class (1) mutation binds to the repeat sequences with sufficiently greater avidity than the wild type Tn5 transposase that such a Tn5 transposase induces about 5- to 50-fold more transposition than the wild type enzyme, when measured in vivo. A modified transposase containing only a class (2) mutation is sufficiently less likely than the wild type Tn5 transposase to assume the multimeric form that such a Tn5 transposase also induces about 5- to 50-fold more transposition than the wild type enzyme, when measured in vivo.

In another aspect, the invention is summarized in that a method for transposing the transposable element from the donor DNA into the target DNA in vitro includes the steps of mixing together the suitably modified Tn5 transposase protein, the donor DNA, and the target DNA in a suitable reaction buffer, allowing the enzyme to bind to the flanking repeat sequences of the donor DNA at a temperature greater than 0° C., but no higher than about 28° C., and then raising the temperature to physiological temperature (about 37° C.) whereupon cleavage and strand transfer can occur.

It is an object of the present invention to provide a useful in vitro transposition system having few structural requirements and high efficiency.

It is another object of the present invention to provide a method that can be broadly applied in various ways, such as to create absolute defective mutants, to provide selective markers to target DNA, to provide portable regions of homology to a target DNA, to facilitate insertion of specialized DNA sequences into target DNA, to provide primer binding sites or tags for DNA sequencing, to facilitate production of genetic fusions for gene expression studies and protein domain mapping, as well as to bring together other desired combinations of DNA sequences (combinatorial genetics).

It is a feature of the present invention that the modified transposase enzyme binds more tightly to DNA than does wild type Tn5 transposase.

It is an advantage of the present invention that the modified transposase facilitates in vitro transposition reaction rates of at least about 100-fold higher than can be achieved using wild type transposase (as measured in vivo). It is noted that the wild-type Tn5 transposase shows no detectable in vitro activity in the system of the present invention. Thus, while it is difficult to calculate an upper limit to the increase in activity, it is clear that hundreds, if not thousands, of colonies are observed when the products of in vitro transposition are assayed in vivo.

It is another advantage of the present invention that in vitro transposition using this system can utilize donor DNA and target DNA that is circular or linear.

It is yet another advantage of the present invention that in vitro transposition using this system requires no outside high energy source and no other protein other than the modified transposase.

Other objects, features, and advantages of the present invention will become apparent upon consideration of the following detailed description.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 depicts test plasmid pRZTL1, used herein to demonstrate transposition in vitro of a transposable element located between a pair of Tn5 outside end termini. Plasmid pRZTL1 is also shown and described in SEQ ID NO:3.

FIG. 2 depicts an electrophoretic analysis of plasmid pRZTL1 before and after in vitro transposition. Data obtained using both circular and linear plasmid substrates are shown.

FIG. 3 is an electrophoretic analysis of plasmid pRZTL1 after in vitro transposition, including further analysis of the molecular species obtained using circular and linear plasmid substrates.

FIG. 4 shows plasmids pRZ1496, pRZ5451 and pRZTL1, which are detailed in the specification.

FIG. 5 shows a plot of papillae per colony over time for various mutant OE sequences tested in vivo against EK54/MA56 transposase.

FIG. 6 shows a plot of papillae per colony over time for various mutant OE sequences with a smaller Y-axis than is shown in FIG. 5 tested against EK54/MA56 transposase.

FIG. 7 shows a plot of papillae per colony over time for various mutant OE sequences tested against MA56 Tn5 transposase.

FIG. 8 shows in vivo transposition using two preferred mutants, tested against MA56 and EK54/MA56 transposase.

DETAILED DESCRIPTION OF THE INVENTION

It will be appreciated that this technique provides a simple, in vitro system for introducing any transposable element from a donor DNA into a target DNA. It is generally accepted and understood that Tn5 transposition requires only a pair of OE termini, located to either side of the transposable element. These OE termini are generally thought to be 18 or 19 bases in length and are inverted repeats relative to one another. Johnson, R. C., and W. S. Reznikoff, Nature 304:280 (1983), incorporated herein by reference. The Tn5 inverted repeat sequences, which are referred to as "termini" even though they need not be at the termini of the donor DNA molecule, are well known and understood.

Apart from the need to flank the desired transposable element with standard Tn5 outside end ("OE") termini, few other requirements on either the donor DNA or the target DNA are envisioned. It is thought that Tn5 has few, if any, preferences for insertion sites, so it is possible to use the system to introduce desired sequences at random into target DNA. Therefore, it is believed that this method, employing the modified transposase described herein and a simple donor DNA, is broadly applicable to introduce changes into any target DNA, without regard to its nucleotide sequence. It will, thus, be applied to many problems of interest to those skilled in the art of molecular biology.

In the method, the modified transposase protein is combined in a suitable reaction buffer with the donor DNA and the target DNA. A suitable reaction buffer permits the transposition reaction to occur. A preferred, but not necessarily optimized, buffer contains spermidine to condense the DNA, glutamate, and magnesium, as well as a detergent, which is preferably 3- (3-cholamidopropyl) dimethyl-ammonio!-1-propane sulfonate ("CHAPS"). The mixture can be incubated at a temperature greater than 0° C. and as high as about 28° C. to facilitate binding of the enzyme to the OE termini. Under the buffer conditions used by the inventors in the Examples, a pretreatment temperature of 30° C. was not adequate. A preferred temperature range is between 16° C. and 28° C. A most preferred pretreatment temperature is about 20° C. Under different buffer conditions, however, it may be possible to use other below-physiological temperatures for the binding step. After a short pretreatment period of time (which has not been optimized, but which may be as little as 30 minutes or as much as 2 hours, and is typically 1 hour), the reaction mixture is diluted with 2 volumes of a suitable reaction buffer and shifted to physiological conditions for several more hours (say 2-3 hours) to permit cleavage and strand transfer to occur. A temperature of 37° C., or thereabouts, is adequate. After about 3 hours, the rate of transposition decreases markedly. The reaction can be stopped by phenol-chloroform extraction and can then be desalted by ethanol precipitation.

When the DNA has been purified using conventional purification tools, it is possible to employ simpler reaction conditions in the in vitro transposition method. DNA of sufficiently high purity can be prepared by passing the DNA preparation through a resin of the type now commonly used in the molecular biology laboratory, such as the Qiagen resin of the Qiagen plasmid purification kit (Catalog No. 12162). When such higher quality DNA is employed, CHAPS can be omitted from the reaction buffer. When CHAPS is eliminated from the reaction buffer, the reactants need not be diluted in the manner described above. Also, the low temperature incubation step noted above can be eliminated in favor of a single incubation for cleavage and strand transfer at physiological conditions. A three hour incubation at 37° C. is sufficient.

Following the reaction and subsequent extraction steps, transposition can be assayed by introducing the nucleic acid reaction products into suitable bacterial host cells (e.g., E. coli K-12 DH5α cells (recA⁻); commercially available from Life Technologies (Gibco-BRL)) preferably by electroporation, described by Dower et al., Nuc. Acids. Res. 16:6127 (1988), and monitoring for evidence of transposition, as is described elsewhere herein.

Those persons skilled in the art will appreciate that apart from the changes noted herein, the transposition reaction can proceed under much the same conditions as would be found in an in vivo reaction. Yet, the modified transposase described herein so increases the level of transposition activity that it is now possible to carry out this reaction in vitro where this has not previously been possible. The rates of reaction are even greater when the modified transposase is coupled with an optimized buffer and temperature conditions noted herein.

In another aspect, the present invention is a preparation of a modified Tn5 transposase enzyme that differs from wild type Tn5 transposase in that it (1) binds to the repeat sequences of the donor DNA with greater avidity than wild type Tn5 transposase and (2) is less likely than the wild type protein to assume an inactive multimeric form. An enzyme having these requirements can be obtained from a bacterial host cell containing an expressible gene for the modified enzyme that is under the control of a promoter active in the host cell. Genetic material that encodes the modified Tn5 transposase can be introduced (e.g., by electroporation) into suitable bacterial host cells capable of supporting expression of the genetic material. Known methods for overproducing and preparing other Tn5 transposase mutants are suitably employed. For example, Weinreich, M. D., et al., supra, describes a suitable method for overproducing a Tn5 transposase. A second method for purifying Tn5 transposase was described in de la Cruz, N. B., et al., "Characterization of the Tn5 Transposase and Inhibitor Proteins: A Model for the Inhibition of Transposition," J. Bact. 175:6932-6938 (1993), also incorporated herein by reference. It is noted that induction can be carried out at temperatures below 37° C., which is the temperature used by de la Cruz, et al. Temperatures at least in the range of 33° to 37° C. are suitable. The inventors have determined that the method for preparing the modified transposase of the present invention is not critical to success of the method, as various preparation strategies have been used with equal success.

Alternatively, the protein can be chemically synthesized, in a manner known to the art, using the amino acid sequence attached hereto as SEQ ID NO:2 as a guide. It is also possible to prepare a genetic construct that encodes the modified protein (and associated transcription and translation signals) by using standard recombinant DNA methods familiar to molecular biologists. The genetic material useful for preparing such constructs can be obtained from existing Tn5 constructs, or can be prepared using known methods for introducing mutations into genetic material (e.g., random mutagenesis PCR or site-directed mutagenesis) or some combination of both methods. The genetic sequence that encodes the protein shown in SEQ ID NO:2 is set forth in SEQ ID NO:1.

The nucleic acid and amino acid sequence of wild type Tn5 transposase are known and published. N.C.B.I. Accession Number U00004 L19385, incorporated herein by reference.

In a preferred embodiment, the improved avidity of the modified transposase for the repeat sequences for OE termini (class (1) mutation) can be achieved by providing a lysine residue at amino acid 54, which is glutamic acid in wild type Tn5 transposase. The mutation strongly alters the preference of the transposase for OE termini, as opposed to inside end ("IE") termini. The higher binding of this mutation, known as EK54, to OE termini results in a transposition rate that is about 10-fold higher than is seen with wild type transposase. A similar change at position 54 to valine (mutant EV54) also results in somewhat increased binding/transposition for OE termini, as does a threonine-to-proline change at position 47 (mutant TP47; about 10-fold higher). It is believed that other, comparable transposase mutations (in one or more amino acids) that increase binding avidity for OE termini may also be obtained which would function as well or better in the in vitro assay described herein.

One of ordinary skill will also appreciate that changes to the nucleotide sequences of the short repeat sequences of the donor DNA may coordinate with other mutation(s) in or near the binding region of the transposase enzyme to achieve the same increased binding effect, and the resulting 5- to 50-fold increase in transposition rate. Thus, while the applicants have exemplified one case of a mutation that improves binding of the exemplified transposase, it will be understood that other mutations in the transposase, or in the short repeat sequences, or in both, will also yield transposases that fall within the scope and spirit of the present invention. A suitable method for determining the relative avidity for Tn5 OE termini has been published by Jilk, R. A., et al., "The Organization of the Outside end of Transposon Tn5," J. Bact. 178:1671-79 (1996).

The transposase of the present invention is also less likely than the wild type protein to assume an inactive multimeric form. In the preferred embodiment, that class (2) mutation from wild type can be achieved by modifying amino acid 372 (leucine) of wild type Tn5 transposase to a proline (and, likewise by modifying the corresponding DNA to encode proline). This mutation, referred to as LP372, has previously been characterized as a mutation in the dimerization region of the transposase. Weinreich, et al., supra. It was noted by Weinreich et al. that this mutation at position 372 maps to a region shown previously to be critical for interaction with an inhibitor of Tn5 transposition. The inhibitor is a protein encoded by the same gene that encodes the transposase, but which is truncated at the N-terminal end of the protein, relative to the transposase. The approach of Weinreich et al. for determining the extent to which multimers are formed is suitable for determining whether a mutation falls within the scope of this element.

It is thought that when wild type Tn5 transposase multimerizes, its activity in trans is reduced. Presumably, a mutation in the dimerization region reduces or prevents multimerization, thereby reducing inhibitory activity and leading to levels of transposition 5- to 50-fold higher than are seen with the wild type transposase. The LP372 mutation achieves about 10-fold higher transposition levels than wild type. Likewise, other mutations (including mutations at a one or more amino acid) that reduce the ability of the transposase to multimerize would also function in the same manner as the single mutation at position 372, and would also be suitable in a transposase of the present invention. It may also be possible to reduce the ability of a Tn5 transposase to multimerize without altering the wild type sequence in the so-called dimerization region, for example by adding into the system another protein or non-protein agent that blocks the dimerization site. Alternatively, the dimerization region could be removed entirely from the transposase protein.

As was noted above, the inhibitor protein, encoded in partially overlapping sequence with the transposase, can interfere with transposase activity. As such, it is desired that the amount of inhibitor protein be reduced over the amount observed in wild type in vivo. For the present assay, the transposase is used in purified form, and it may be possible to separate the transposase from the inhibitor (for example, according to differences in size) before use. However, it is also possible to genetically eliminate the possibility of having any contaminating inhibitor protein present by removing its start codon from the gene that encodes the transposase.

An AUG in the wild type Tn5 transposase gene that encodes methionine at transposase amino acid 56 is the first codon of the inhibitor protein. However, it has already been shown that replacement of the methionine at position 56 has no apparent effect upon the transposase activity, but at the same time prevents translation of the inhibitor protein, thus resulting in a somewhat higher transposition rate. Weigand, T. W. and W. S. Reznikoff, "Characterization of Two Hypertransposing Tn5 Mutants," J. Bact. 174:1229-1239 (1992), incorporated herein by reference. In particular, the present inventors have replaced the methionine with an alanine in the preferred embodiment (and have replaced the methionine-encoding AUG codon with an alanine-encoding GCC). A preferred transposase of the present invention therefore includes an amino acid other than methionine at amino acid position 56, although this change can be considered merely technically advantageous (since it ensures the absence of the inhibitor from the in vitro system) and not essential to the invention (since other means can be used to eliminate the inhibitor protein from the in vitro system).

The most preferred transposase amino acid sequence known to the inventors differs from the wild type at amino acid positions 54, 56, and 372. The mutations at positions 54 and 372 separately contribute approximately a 10-fold increase to the rate of transposition reaction in vivo. When the mutations are combined using standard recombinant techniques into a single molecule containing both classes of mutations, reaction rates of at least about 100-fold higher than can be achieved using wild type transposase are observed when the products of the in vitro system are tested in vivo. The mutation at position 56 does not directly affect the transposase activity.

Other mutants from wild type that are contemplated to be likely to contribute to high transposase activity in vitro include, but are not limited to glutaminic acid-to-lysine at position 110, and glutamic acid to lysine at position 345.

It is, of course, understood that other changes apart from these noted positions can be made to the modified transposase (or to a construct encoding the modified transposase) without adversely affecting the transposase activity. For example, it is well understood that a construct encoding such a transposase could include changes in the third position of codons such that the encoded amino acid does not differ from that described herein. In addition, certain codon changes have little or no functional effect upon the transposition activity of the encoded protein. Finally, other changes may be introduced which provide yet higher transposition activity in the encoded protein. It is also specifically envisioned that combinations of mutations can be combined to encode a modified transposase having even higher transposition activity than has been exemplified herein. All of these changes are within the scope of the present invention. It is noted, however, that a modified transposase containing the EK110 and EK345 mutations (both described by Weigand and Reznikoff, supra, had lower transposase activity than a transposase containing either mutation alone.

After the enzyme is prepared and purified, as described supra, it can be used in the in vitro transposition reaction described above to introduce any desired transposable element from a donor DNA into a target DNA. The donor DNA can be circular or can be linear. If the donor DNA is linear, it is preferred that the repeat sequences flanking the transposable element should not be at the termini of the linear fragment but should rather include some DNA upstream and downstream from the region flanked by the repeat sequences.

As was noted above, Tn5 transposition requires a pair of eighteen or nineteen base long termini. The wild type Tn5 outside end (OE) sequence (5'-CTGACTCTTATACACAAGT-3') (SEQ ID NO: 7) has been described. It has been discovered that a transposase-catalyzed in vitro transposition frequency at least as high as that of wild type OE is achieved if the termini in a construct include bases ATA at positions 10, 11, and 12, respectively, as well as the nucleotides in common between wild type OE and IE (e.g., at positions 1-3, 5-9, 13, 14, 16, and optionally 19). The nucleotides at positions 4, 15, 17, and 18 can correspond to the nucleotides found at those positions in either wild type OE or wild type IE. It is noted that the transposition frequency can be enhanced over that of wild type OE if the nucleotide at position 4 is a T. The importance of these particular bases to transposition frequency has not previously been identified.

It is noted that these changes are not intended to encompass every desirable modification to OE. As is described elsewhere herein, these attributes of acceptable termini modifications were identified by screening mutants having randomized differences between IE and OE termini. While the presence in the termini of certain nucleotides is shown herein to be advantageous, other desirable terminal sequences may yet be obtained by screening a larger array of degenerate mutants that include changes at positions other than those tested herein as well as mutants containing nucleotides not tested in the described screening. In addition, it is clear to one skilled in the art that if a different transposase is used, it may still be possible to select other variant termini, more compatible with that particular transposase.

Among the mutants shown to be desirable and within the scope of the invention are two hyperactive mutant OE sequences that were identified in vivo. Although presented here as single stranded sequences, in fact, the wild type and mutant OE sequences include complementary second strands. The first hyperactive mutant, 5'-CTGTCTCTTATACACATCT-3' (SEQ ID NO: 8), differs from the wild type OE sequence at positions 4, 17, and 18, counting from the 5' end, but retains ATA at positions 10-12. The second, 5'-CTGTCTCTTATACAGATCT-3' (SEQ ID NO: 9), differs from the wild type OE sequence at positions 4, 15, 17, and 18, but also retains ATA at positions 10-12. These two hyperactive mutant OE sequences differ from one another only at position 15, where either G or C is present. OE-like activity (or higher activity) is observed in a mutant sequence when it contains ATA at positions 10, 11 and 12. It may be possible to reduce the length of the OE sequence from 19 to 18 nucleotide pairs with little or no effect.

When one of the identified hyperactive mutant OE sequences flanks a substrate DNA, the in vivo transposition frequency of EK54/MA56 transposase is increased approximately 40-60 fold over the frequency that is observed when wild type OE termini flank the transposable DNA. The EK54/MA56 transposase is already known to have an in vivo transposition frequency approximately an 8-10 fold higher than wild type transposase, using wild type OE termini. Tn5 transposase having the EK54/MA56 mutation is known to bind with greater avidity to OE and with lesser avidity to the Tn5 inside ends (IE) than wild type transposase.

A suitable mutant terminus in a construct for use in the assays of the present invention is characterized biologically as yielding more papillae per colony in a comparable time, say 68 hours, than is observed in colonies harboring wild type OE in a comparable plasmid. Wild type OE can yield about 100 papillae per colony when measured 68 hours after plating in a papillation assay using EK54/MA56 transposase, as is described elsewhere herein. A preferred mutant would yield between about 200 and 3000 papillae per colony, and a more preferred mutant between about 1000 and 3000 papillae per colony, when measured in the same assay and time frame. A most preferred mutant would yield between about 2000 and 3000 papillae per colony when assayed under the same conditions. Papillation levels may be even greater than 3000 per colony, although it is difficult to quantitate at such levels.

Transposition frequency is also substantially enhanced in the in vitro transposition assay of the present invention when substrate DNA is flanked by a preferred mutant OE sequence and a most preferred mutant transposase (comprising EK54/MA56/LP372 mutations) is used. Under those conditions, essentially all of the substrate DNA is converted into transposition products.

The rate of in vitro transposition observed using the hyperactive termini is sufficiently high that, in the experience of the inventors, there is no need to select for transposition events. All colonies selected at random after transformation for further study have shown evidence of transposition events.

This advance can represent a significant savings in time and laboratory effort. For example, it is particularly advantageous to be able to improve in vitro transposition frequency by modifying DNA rather than by modifying the transposase because as transposase activity increases in host cells, there is an increased likelihood that cells containing the transposase are killed during growth as a result of aberrant DNA transpositions. In contrast, DNA of interest containing the modified OE termini can be grown in sources completely separate from the transposase, thus not putting the host cells at risk.

Without intending to limit the scope of this aspect of this invention, it is apparent that the tested hyperactive termini do not bind with greater avidity to the transposase than do wild type OE termini. Thus, the higher transposition frequency brought about by the hyperactive termini is not due to enhanced binding to transposase.

The transposable element between the termini can include any desired nucleotide sequence. The length of the transposable element between the termini should be at least about 50 base pairs, although smaller inserts may work. No upper limit to the insert size is known. However, it is known that a donor DNA portion of about 300 nucleotides in length can function well. By way of non-limiting examples, the transposable element can include a coding region that encodes a detectable or selectable protein, with or without associated regulatory elements such as promoter, terminator, or the like.

If the element includes such a detectable or selectable coding region without a promoter, it will be possible to identify and map promoters in the target DNA that are uncovered by transposition of the coding region into a position downstream thereof, followed by analysis of the nucleic acid sequences upstream from the transposition site.

Likewise, the element can include a primer binding site that can be transposed into the target DNA, to facilitate sequencing methods or other methods that rely upon the use of primers distributed throughout the target genetic material. Similarly, the method can be used to introduce a desired restriction enzyme site or polylinker, or a site suitable for another type of recombination, such as a cre-lox, into the target.

The invention can be better understood upon consideration of the following examples which are intended to be exemplary and not limiting on the invention.

EXAMPLES

To obtain the transposase modified at position 54, the first third of the coding region from an existing DNA clone that encodes the Tn5 transposase but not the inhibitor protein (MA56) was mutagenized according to known methods and DNA fragments containing the mutagenized portion were cloned to produce a library of plasmid clones containing a full length transposase gene. The clones making up the library were transformed into E. coli K-12 strain MDW320 bacteria which were plated and grown into colonies. Transposable elements provided in the bacteria on a separate plasmid contained a defective lacZ gene. The separate plasmid, pOXgen386, was described by Weinreich, M. et al., "A functional analysis of the Tn5 Transposase: Identification of Domains Required for DNA Binding and Dimerization," J. Mol. Biol. 241:166-177 (1993), incorporated herein by reference. Colonies having elevated transposase activity were selected by screening for blue (LacZ) spots in white colonies grown in the presence of X-gal. This papillation assay was described by Weinreich, et al. (1993), supra. The 5'-most third of Tn5 transposase genes from such colonies were sequenced to determine whether a mutation was responsible for the increase in transposase activity. It was determined that a mutation at position 54 to lysine (K) correlated well with the increase in transposase activity. Plasmid pRZ5412-EK54 contains lysine at position 54 as well as the described alanine at position 56.

The fragment containing the LP372 mutation was isolated from pRZ4870 (Weinreich et al (1994)) using restriction enzymes NheI and BglII, and were ligated into NheI-BglII cut pRZ5412-EK54 to form a recombinant gene having the mutations at positions 54, 56 and 372, as described herein and shown in SEQ ID NO:1. The gene was tested and shown to have at least about a one hundred fold increase in activity relative to wild type Tn5 transposase. Each of the mutants at positions 54 and 372 alone had about a 10-fold increase in transposase activity.

The modified transposase protein encoded by the triple-mutant recombinant gene was transferred into commercial T7 expression vector pET-21D (commercially available from Novagen, Madison, Wis.) by inserting a BspHI/SalI fragment into NhoI/XhoI fragment of the pET-21D vector. This cloning puts the modified transposase gene under the control of the T7 promoter, rather than the natural promoter of the transposase gene. The gene product was overproduced in BL21(DE3)pLysS bacterial host cells, which do not contain the binding site for the enzyme, by specific induction in a fermentation process after cell growth is complete. (See, Studier, F. W., et al., "Use of T7 RNA Polymerase to Direct Expression of Cloned Genes," Methods Enzymol. 185:60-89 (1990)). The transposase was partially purified using the method of de la Cruz, modified by inducing overproduction at 33 or 37° C. After purification, the enzyme preparation was stored at -70° C. in a storage buffer (10% glycerol, 0.7M NaCl, 20 mM Tris-HCl, pH 7.5, 0.1% Triton-X100 and 10 mM CHAPS) until use. This storage buffer is to be considered exemplary and not optimized.

A single plasmid (pRZTL1, FIG. 1) was constructed to serve as both donor and target DNA in this Example. The complete sequence of the pRZTL1 plasmid DNA is shown and described in SEQ ID NO:3. Plasmid pRZTL1 contains two Tn5 19 base pair OE termini in inverted orientation to each other. Immediately adjacent to one OE sequence is a gene that would encode tetracycline resistance, but for the lack of an upstream promoter. However, the gene is expressed if the tetracycline resistance gene is placed downstream of a transcribed region (e.g., under the control of the promoter that promotes transcription of the chloramphenicol resistance gene also present on pRZTL1). Thus, the test plasmid pRZTL1 can be assayed in vivo after the in vitro reaction to confirm that transposition has occurred. The plasmid pRZTL1 also includes an origin of replication in the transposable element, which ensures that all transposition products are plasmids that can replicate after introduction in host cells.

The following components were used in typical 20 μl in vitro transposition reactions:

Modified transposase: 2 μl (approximately 0.1 μg enzyme/μl) in storage buffer (10% glycerol, 0.7M NaCl, 20 mM Tris-HCl, pH 7.5, 0.1% Triton-X100 and 10 mM CHAPS)

Donor/Target DNA: 18 μl (approximately 1-2 μg) in reaction buffer (at final reaction concentrations of 0.1 M potassium glutamate, 25 mM Tris acetate, pH 7.5, 10 mM Mg²⁺ -acetate, 50 μg/ml BSA, 0.5 mM β-mercaptoethanol, 2 mM spermidine, 100 μg/ml tRNA).

At 20° C., the transposase was combined with pRZTL1 DNA for about 60 minutes. Then, the reaction volume was increased by adding two volumes of reaction buffer and the temperature was raised to 37° C. for 2-3 hours whereupon cleavage and strand transfer occurred.

Efficient in vitro transposition was shown to have occurred by in vivo and by in vitro methods. In vivo, many tetracycline-resistant colonies were observed after transferring the nucleic acid product of the reaction into DH5α bacterial cells. As noted, tetracycline resistance can only arise in this system if the transposable element is transposed downstream from an active promoter elsewhere on the plasmid. A typical transposition frequency was 0.1% of cells that received plasmid DNA, as determined by counting chloramphenicol resistant colonies. However, this number underestimates the total transposition event frequency because the detection system limits the target to 1/16 of the total.

Moreover, in vitro electrophoretic (1% agarose) and DNA sequencing analyses of DNA isolated from purified colonies revealed products of true transposition events, including both intramolecular and intermolecular events. Results of typical reactions using circular plasmid pRZTL1 substrates are shown in Lanes 4 & 5. Lane 6 of FIG. 2 shows the results obtained using linear plasmid pRZTL1 substrates.

The bands were revealed on 1% agarose gels by staining with SYBR Green nucleic gel stain (FMC BioProducts) and were scanned on a Flourimager SI fluorescent sample imager (Molecular Dynamics). In FIG. 2, lane 1 shows relaxed circle, linear, and closed circle versions of pRZTL1. Lanes 2 and 3 show intramolecular and intermolecular transposition products after in vitro transposition of pRZTL1, respectively. The products were purified from electroporated DH5α cells and were proven by size and sequence analysis to be genuine transposition products. Lanes 4 and 5 represent products of two independent in vitro reactions using a mixture of closed and relaxed circular test plasmid substrates. In lane 6, linear pRZTL1 (XhoI-cut) was the reaction substrate. Lane 7 includes a BstEII digest of lambda DNA as a molecular weight standard.

FIG. 3 reproduces lanes 4, 5, and 6 of FIG. 2 and shows an analysis of various products, based upon secondary restriction digest experiments and re-electroporation and DNA sequencing. The released donor DNA corresponds to the fragment of pRZTL1 that contains the kanamycin resistance gene between the two OE sequences, or, in the case of the linear substrate, the OE-XhoI fragment. Intermolecular transposition products can be seen only as relaxed DNA circles. Intramolecular transposition products are seen as a ladder, which results from conversion of the initial superhelicity of the substrate into DNA knots. The reaction is efficient enough to achieve double transposition events that are a combination of inter- and intramolecular events.

A preliminary investigation was made into the nature of the termini involved in a transposition reaction. Wild type Tn5 OE and IE sequences were compared and an effort was undertaken to randomize the nucleotides at each of the seven positions of difference. A population of oligonucleotides degenerate at each position of difference was created. Thus, individual oligonucleotides in the population randomly included either the nucleotide of the wild type OE or the wild type IE sequence. In this scheme, 2⁷ (128) distinct oligonucleotides were synthesized using conventional tools. These oligonucleotides having sequence characteristics of both OE and IE are referred to herein as OE/IE-like sequences. To avoid nomenclature issues that arise because the oligonucleotides are intermediate between OE and IE wild type sequences, the applicants herein note that selected oligonucleotide sequences are compared to the wild type OE rather than to wild type IE, unless specifically noted. It will be appreciated by one skilled in the art that if IE is selected as the reference point, the differences are identical but are identified differently.

The following depicts the positions (x) that were varied in this mutant production scheme. WT OE is shown also at SEQ ID NO: 7, WT IE at SEQ ID NO: 10.

    ______________________________________     5'-CTGACTCTTATACACAAGT-3'                         (WT OE)     x        xxx    x xx        (positions of difference)     5'-CTGTCTCTTGATCAGATCT-3'                         (WT IE)     ______________________________________

In addition to the degenerate OE/IE-like sequences, the 37- base long synthetic oligonucleotides also included terminal SphI and KpnI restriction enzyme recognition and cleavage sites for convenient cloning of the degenerate oligonucleotides into plasmid vectors. Thus, a library of randomized termini was created from population of 2⁷ (128) types of degenerate oligonucleotides.

FIG. 4 shows pRZ1496, the complete sequence of which is presented as SEQ ID NO:11. The following features are noted in the sequence:

    ______________________________________     Feature          Position     ______________________________________     WT OE            94-112     LacZ coding      135-3137     LacY coding      3199-4486     LacA coding      4553-6295     tet.sup.r coding 6669-9442     transposase coding                      10683-12111 (Comp. Strand)     Cassette IE      12184-12225     colE1 sequence   127732-19182     ______________________________________

The IE cassette shown in FIG. 4 was excised using SphI and KpnI and was replaced, using standard cleavage and ligation methods, by the synthetic termini cassettes comprising OE/IE-like portions. Between the fixed wild type OE sequence and the OE/IE-like cloned sequence, plasmid pRZ1496 comprises a gene whose activity can be detected, namely LacZYA, as well as a selectable marker gene, tet^(r). The LacZ gene is defective in that it lacks suitable transcription and translation initiation signals. The LacZ gene is transcribed and translated only when it is transposed into a position downstream from such signals.

The resulting clones were transformed using electroporation into dam⁻, LacZ⁻ bacterial cells, in this case JCM101/pOXgen cells which were grown at 37° C. in LB medium under standard conditions. A dam⁻ strain is preferred because dam methylation can inhibit IE utilization and wild type IE sequences include two dam methylation sites. A dam⁻ strain eliminates dam methylation as a consideration in assessing transposition activity. The Tet^(r) cells selected were LacZ⁻ ; transposition-activated Lac expression was readily detectable against a negative background. pOXgen is a non-essential F factor derivative that need not be provided in the host cells.

In some experiments, the EK54/MA56 transposase was encoded directly by the transformed pRZ1496 plasmid. In other experiments, the pRZ1496 plasmid was modified by deleting a unique HindIII/EagI fragment (nucleotides 9112-12083) from the plasmid (see FIG. 4) to prevent transposase production. In the latter experiments, the host cells were co-transformed with the HindIII/EagI-deleted plasmid, termed pRZ5451 (FIG. 4), and with an EK54/MA56 transposase-encoding chloramphenicol-resistant plasmid. In some experiments, a comparable plasmid encoding a wild type Tn5 transposase was used for comparison.

Transposition frequency was assessed by a papillation assay that measured the number of blue spots (Lac producing cells or "papillae") in an otherwise white colony. Transformed cells were plated (approx. 50 colonies per plate) on Glucose minimal Miller medium (Miller, J., Experiments in Molecular Genetics, Cold Spring Harbor Laboratory, Cold Spring Harbor, N.Y. (1972)) containing 0.3% casamino acids, 5-bromo-4-chloro-3-indolyl-β-D-galactoside (40 μg/ml) and phenyl-β-D-galactoside (0.05%). The medium contained tetracycline (15 μg/ml) and, where needed, chloramphenicol (20 μg/ml). Colonies that survived the selection were evaluated for transposition frequency in vivo. Although colonies exhibiting superior papillation were readily apparent to the naked eye, the number of blue spots per colony were determined over a period of several days (approximately 90 hours post-plating).

To show that the high-papillation phenotype was conferred by the end mutations in the plasmids, colonies were re-streaked if they appeared to have papillation levels higher than was observed when wild type IE was included on the plasmid. Colonies picked from the streaked culture plates were themselves picked and cultured. DNA was obtained and purified from the cultured cells, using standard protocols, and was transformed again into "clean" JCM101/pOXgen cells. Papillation levels were again compared with wild type IE-containing plasmids in the above-noted assays, and consistent results were observed.

To obtain DNA for sequencing of the inserted oligonucleotide, cultures were grown from white portions of 117 hyperpapillating colonies, and DNA was prepared from each colony using standard DNA miniprep methods. The DNA sequence of the OE/IE-like portion of 117 clones was determined (42 from transformations using pRZ1496 as the cloning vehicle; 75 from transformations using pRZ5451 as the cloning vehicle). Only 29 unique mutants were observed. Many mutants were isolated multiple times. All mutants that showed the highest papillation frequencies contain OE-derived bases at positions 10, 11, and 12. When the OE-like bases at these positions were maintained, it was impossible to measure the effect on transposition of other changes, since the papillation level was already extremely high.

One thousand five hundred seventy five colonies were screened as described above. The likelihood that all 128 possible mutant sequences were screened was greater than 95%. Thus, it is unlikely that other termini that contribute to a greater transformation frequency will be obtained using the tested transposase.

                                      TABLE I     __________________________________________________________________________     trans papillation level of hybrid end sequences with EK54 Tnp                                                  papillation                                                       # of times     mutant position            1 2 3 4 5 6 7 8 9 10                                11                                  12                                    13                                      14                                        15                                          16                                            17                                              18        19                                              level.sup.a                                              isolated.sup.b     __________________________________________________________________________     IE     c t g T c t c t t G A T c a G a T C t VL   0     OE           A           A T A     C   A G         M                                              6     1                        A T A                     H                                              2     2                        A T A     C               H                                              3     3                        A T A         A           H                                              5     4                        A T A     C   A           H                                              4     5                        A T A     C     G         H                                              6     6                        A T A         A G         H                                              6     7                        A T A     C   A G         H                                              4     8                        A T A           G         M                                              7     9            A           A T A                     M                                              3     10           A           A T A     C               M                                              2     11           A           A T A         A           M                                              1     12           A           A T A           G         0     13           A           A T A     C   A           0     14           A           A T A     C     G         M                                              4     15           A           A T A         A G         M                                              4     16                       A T       C   A           L                                              2     17                       A T           A G         L                                              1     18                       A T       C   A G         L                                              2     19                       A         C   A G         L                                              1     20                         T       C   A G         L                                              1     21                                 C   A G         L                                              1     __________________________________________________________________________      All hybrid end sequences isolated on pRZ5451 that papillate more      frequently than wt IE, when the EK54 Tnp is expressed from pFMA187, are      listed.      .sup.a trans papillation levels of wt IE, wt OE and hybrid end sequences      are classified as follows: VLvery low, Llow, Mmedium, and Hhigh.      .sup.b mutants 12 and 13 were not found in this experiment, they were      found in cis papillation screening (Table II).

                                      TABLE II     __________________________________________________________________________     cis papillation level of hybrid end sequences with EK54 Tnp                                                  papillation                                                       # of times     mutant position            1 2 3 4 5 6 7 8 9 10                                11                                  12                                    13                                      14                                        15                                          16                                            17                                              18        19                                              level.sup.a                                              isolated.sup.b     __________________________________________________________________________     IE     c t g T c t c t t G A T c a G a T C t VL   0     OE           A           A T A     C   A G         H                                              2     1                        A T A                     H                                              2     2                        A T A     C               0     3                        A T A         A           H                                              1     4                        A T A     C   A           H                                              1     5                        A T A     C     G         H                                              1     6                        A T A         A G         H                                              2     7                        A T A     C   A G         H                                              3     8                        A T A           G         H                                              1     9            A           A T A                     H                                              1     10           A           A T A     C               H                                              0     11           A           A T A         A           H                                              2     12           A           A T A           G         MH                                              3     13           A           A T A     C   A           MH                                              1     14           A           A T A     C     G         0     15           A           A T A         A G         H                                              2     16                       A T       C   A           M                                              1     17                       A T           A G         M                                              1     18           A           A T       C               M                                              2     19           A           A T       C   A           M                                              2     20           A           A T       C   A G         M                                              1     21                       A   A         A           M                                              4     22                       A   A           G         M                                              1     23                       A   A     C   A G         M                                              1     24                       A         C   A           M                                              1     25                       A         C   A G         M                                              1     26                         T C A G   M 1     27                               C   A G           M                                              2     __________________________________________________________________________      All hybrid end sequences isolated on pRZ1496 that papillate more      frequently than wt IE, when the EK54 Tnp is expressed from the same      plasmid, are listed.      .sup.a cis papillation levels of wt IE, wt OE and hybrid end sequences ar      classified as follows: Llow, Mmedium, and MHmedium high, Hhigh.      .sup.b mutants 2, 10 and 14 were not found in this experiment, they were      found in trans papillation screening (Table I).

Tables I and II report the qualitative papillation level of mutant constructs carrying the indicated hybrid end sequences or the wild type OE or IE end sequences. In the tables, the sequence at each position of the terminus corresponds to wild type IE unless otherwise noted. The applicants intend that, while the sequences are presented in shorthand notation, one of ordinary skill can readily determine the complete 19 base pair sequence of every presented mutant, and this specification is to be read to include all such complete sequences. Table I includes data from trials where the EK54 transposase was provided in trans; Table II, from those trials where the EK54 transposase was provided in cis. Although a transposase provided in cis is more active in absolute terms than a transposase provided in trans, the cis or trans source of the transposase does not alter the relative in vivo transposition frequencies of the tested termini.

Tables I and II show that every mutant that retains ATA at positions 10, 11, and 12, respectively, had an activity comparable to, or higher than, wild type OE, regardless of whether the wild type OE activity was medium (Table I, trans) or high (Table II, cis). Moreover, whenever that three-base sequence in a mutant was not ATA, the mutant exhibited lower papillation activity than wild type OE. It was also noted that papillation is at least comparable to, and tends to be significantly higher than, wild type OE when position 4 is a T.

Quantitative analysis of papillation levels was difficult, beyond the comparative levels shown (very low, low, medium, medium high, and high). However, one skilled in the art can readily note the papillation level of OE and can recognize those colonies having comparable or higher levels. It is helpful to observe the papillae with magnification.

The number of observed papillae increased over time, as is shown in FIGS. 5-7 which roughly quantitate the papillation observed in cells transformed separately with 9 clones containing either distinct synthetic termini cassettes or wild type OE or IE termini. In these 3 figures, each mutant is identified by its differences from the wild type IE sequence. Note, that, among the tested mutants, only mutant 10A/11T/12A had a higher transposition papillation level than wild type OE. That mutant, which would be called mutant 4/15/17/18 when OE is the reference sequence) was the only mutant of those shown in FIGS. 5-7 that retained the nucleotides ATA at positions 10, 11, and 12. FIGS. 5 (y-axis: 0-1500 papillae) and 6 (y-axis: 0-250 papillae) show papillation using various mutants plus IE and OE controls and the EK54/MA56 enzyme. FIG. 7 (y-axis: 0-250 papillae), shows papillation when the same mutant sequences were tested against the wild type (more properly, MA56) transposase. The 10A/11T/12A mutant (SEQ ID NO: 9) yielded significantly more papillae (approximately 3000) in a shorter time (68 hours) with ED54/MA56 transposase than was observed even after 90 hours with the WT OE (approximately 1500). A single OE-like nucleotide at position 15 on an IE-like background also increased papillation frequency.

In vivo transposition frequency was also quantitated in a tetracycline-resistance assay using two sequences having high levels of hyperpapillation. These sequences were 5'-CTGTCTCTTATACACATCT-3' (SEQ ID NO: 8), which differs from the wild type OE sequence at positions 4, 17, and 18, counting from the 5' end, and 5'-CTGTCTCTTATACAGATCT-3' (SEQ ID NO: 9), which differs from the wild type OE at positions 4, 15, 17, and 18. These sequences are considered the preferred mutant termini in an assay using a transposase that contains EK54/MA56 or a transposase that contains MA56. Each sequence was separately engineered into pRZTL1 in place of the plasmid's two wild type OE sequences. A PCR-amplified fragment containing the desired ends flanking the kanamycin resistance gene was readily cloned into the large HindIII fragment of pRZTL1. The resulting plasmids are identical to pRZTL1 except at the indicated termini. For comparison, pRZTL1 and a derivative of pRZTL1 containing two wild type IE sequences were also tested. In the assay, JCM101/pOXgen cells were co-transformed with a test plasmid (pRZTL1 or derivative) and a high copy number amp^(r) plasmid that encoded either the EK54/MA56 transposase or wild type (MA56) transposase. The host cells become tetracycline resistant only when a transposition event brings the Tet^(r) gene into downstream proximity with a suitable transcriptional promoter elsewhere on a plasmid or on the chromosome. The total number of cells that received the test plasmids was determined by counting chloramphenicol resistant, ampicillin resistant colonies. Transposition frequency was calculated by taking the ratio of tet^(r) /cam^(r) amp^(r) colonies. Approximately 40 to 60 fold increase over wild type OE in in vivo transposition was observed when using either of the mutant termini and EK54/MA56 transposase. Of the two preferred mutant termini, the one containing mutations at three positions relative to the wild type OE sequence yielded a higher increase.

As is shown in FIG. 8, which plots the tested plasmid against the transposition frequency (×10⁻⁸), little transposition was seen when the test plasmid included two IE termini. Somewhat higher transposition was observed when the test plasmid included two OE termini, particularly when the EK54/MA56 transposase was employed. In striking contrast, the combination of the EK54/MA56 transposase with either of the preferred selected ends (containing OE-like bases only at positions 10, 11, and 12, or positions 10, 11, 12, and 15) yielded a great increase in in vivo transposition over wild type OE termini.

The preferred hyperactive mutant terminus having the most preferred synthetic terminus sequence 5'-CTGTCTCTTATACACATCT-3' (SEQ ID NO: 8) was provided in place of both WT OE termini in pRZTL1 (FIG. 4) and was tested in the in vitro transposition assay of the present invention using the triple mutant transposase described herein. This mutant terminus was chosen for further in vitro analysis because its transposition frequency was higher than for the second preferred synthetic terminus and because it has no dam methylation sites, so dam methylation no longer affects transposition frequency. In contrast the 4/15/17/18 mutant does have a dam methylation site.

In a preliminary experiment, CHAPS was eliminated from the reaction, but the pre-incubation step was used. The reaction was pre-incubated for 1 hour at 20° C., then diluted two times, and then incubated for 3 hours at 37° C. About 0.5 μg of DNA and 0.4 μg of transposase was used. The transposition products were observed on a gel. With the mutant termini, very little of the initial DNA was observed. Numerous bands representing primary and secondary transposition reaction products were observed. The reaction mixtures were transformed into DH5α cells and were plated on chloramphenicol-, tetracycline-, or kanamycin-containing plates.

Six hundred forty chloramphenicol-resistant colonies were observed. Although these could represent unreacted plasmid, all such colonies tested (n=12) were sensitive to kanamycin, which indicates a loss of donor backbone DNA. All twelve colonies also included plasmids of varied size; 9 of the 12 were characterized as deletion-inversions, the remaining 3 were simple deletions. Seventy nine tetracycline-resistant colonies were observed, which indicated an activation of the tet^(r) gene by transposition.

Eleven kanamycin resistant colonies were observed. This indicated a low percentage of remaining plasmids carrying the donor backbone DNA.

In a second, similar test, about 1 μg of plasmid DNA and 0.2 μg transposase were used. In this test, the reaction was incubated without CHAPS at 37° C. for 3 hours without preincubation or dilution. Some initial DNA was observed in the gel after the 3 hour reaction. After overnight incubation, only transposition products were observed.

The 3 hour reaction products were transformed into DH5α cells and plated as described. About 50% of the chloramphenicol resistant colonies were sensitive to kanamycin and were presumably transposition products.

The invention is not intended to be limited to the foregoing examples, but to encompass all such modifications and variations as come within the scope of the appended claims. It is envisioned that, in addition to the uses specifically noted herein, other applications will be apparent to the skilled molecular biologist. In particular, methods for introducing desired mutations into prokaryotic or eukaryotic DNA are very desirable. For example, at present it is difficult to knock out a functional eukaryotic gene by homologous recombination with an inactive version of the gene that resides on a plasmid. The difficulty arises from the need to flank the gene on the plasmid with extensive upstream and downstream sequences. Using this system, however, an inactivating transposable element containing a selectable marker gene (e.g., neo) can be introduced in vitro into a plasmid that contains the gene that one desires to inactivate. After transposition, the products can be introduced into suitable host cells. Using standard selection means, one can recover only cell colonies that contain a plasmid having the transposable element. Such plasmids can be screened, for example by restriction analysis, to recover those that contain a disrupted gene. Such clones can then be introduced directly into eukaryotic cells for homologous recombination and selection using the same marker gene.

Also, one can use the system to readily insert a PCR-amplified DNA fragment into a vector, thus avoiding traditional cloning steps entirely. This can be accomplished by (1) providing suitable a pair of PCR primers containing OE termini adjacent to the sequence-specific parts of the primers, (2) performing standard PCR amplification of a desired nucleic acid fragment, (3) performing the in vitro transposition reaction of the present invention using the double-stranded products of PCR amplification as the donor DNA.

    __________________________________________________________________________     #             SEQUENCE LISTING     - (1) GENERAL INFORMATION:     -    (iii) NUMBER OF SEQUENCES: 11     - (2) INFORMATION FOR SEQ ID NO:1:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 1534 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Gene encoding modified Tn5sc     #enzyme"       transposase     -     (ix) FEATURE:               (A) NAME/KEY: CDS               (B) LOCATION: 93..1523     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:1:     - CTGACTCTTA TACACAAGTA GCGTCCTGAA CGGAACCTTT CCCGTTTTCC AG - #GATCTGAT       60     - CTTCCATGTG ACCTCCTAAC ATGGTAACGT TC ATG ATA ACT TCT - # GCT CTT CAT      113     #Met Ile Thr Ser Ala Leu His     #  1               5     - CGT GCG GCC GAC TGG GCT AAA TCT GTG TTC TC - #T TCG GCG GCG CTG GGT      161     Arg Ala Ala Asp Trp Ala Lys Ser Val Phe Se - #r Ser Ala Ala Leu Gly     #         20     - GAT CCT CGC CGT ACT GCC CGC TTG GTT AAC GT - #C GCC GCC CAA TTG GCA      209     Asp Pro Arg Arg Thr Ala Arg Leu Val Asn Va - #l Ala Ala Gln Leu Ala     #     35     - AAA TAT TCT GGT AAA TCA ATA ACC ATC TCA TC - #A GAG GGT AGT AAA GCC      257     Lys Tyr Ser Gly Lys Ser Ile Thr Ile Ser Se - #r Glu Gly Ser Lys Ala     # 55     - GCC CAG GAA GGC GCT TAC CGA TTT ATC CGC AA - #T CCC AAC GTT TCT GCC      305     Ala Gln Glu Gly Ala Tyr Arg Phe Ile Arg As - #n Pro Asn Val Ser Ala     #                 70     - GAG GCG ATC AGA AAG GCT GGC GCC ATG CAA AC - #A GTC AAG TTG GCT CAG      353     Glu Ala Ile Arg Lys Ala Gly Ala Met Gln Th - #r Val Lys Leu Ala Gln     #             85     - GAG TTT CCC GAA CTG CTG GCC ATT GAG GAC AC - #C ACC TCT TTG AGT TAT      401     Glu Phe Pro Glu Leu Leu Ala Ile Glu Asp Th - #r Thr Ser Leu Ser Tyr     #        100     - CGC CAC CAG GTC GCC GAA GAG CTT GGC AAG CT - #G GGC TCT ATT CAG GAT      449     Arg His Gln Val Ala Glu Glu Leu Gly Lys Le - #u Gly Ser Ile Gln Asp     #   115     - AAA TCC CGC GGA TGG TGG GTT CAC TCC GTT CT - #C TTG CTC GAG GCC ACC      497     Lys Ser Arg Gly Trp Trp Val His Ser Val Le - #u Leu Leu Glu Ala Thr     120                 1 - #25                 1 - #30                 1 -     #35     - ACA TTC CGC ACC GTA GGA TTA CTG CAT CAG GA - #G TGG TGG ATG CGC CCG      545     Thr Phe Arg Thr Val Gly Leu Leu His Gln Gl - #u Trp Trp Met Arg Pro     #               150     - GAT GAC CCT GCC GAT GCG GAT GAA AAG GAG AG - #T GGC AAA TGG CTG GCA      593     Asp Asp Pro Ala Asp Ala Asp Glu Lys Glu Se - #r Gly Lys Trp Leu Ala     #           165     - GCG GCC GCA ACT AGC CGG TTA CGC ATG GGC AG - #C ATG ATG AGC AAC GTG      641     Ala Ala Ala Thr Ser Arg Leu Arg Met Gly Se - #r Met Met Ser Asn Val     #       180     - ATT GCG GTC TGT GAC CGC GAA GCC GAT ATT CA - #T GCT TAT CTG CAG GAC      689     Ile Ala Val Cys Asp Arg Glu Ala Asp Ile Hi - #s Ala Tyr Leu Gln Asp     #   195     - AGG CTG GCG CAT AAC GAG CGC TTC GTG GTG CG - #C TCC AAG CAC CCA CGC      737     Arg Leu Ala His Asn Glu Arg Phe Val Val Ar - #g Ser Lys His Pro Arg     200                 2 - #05                 2 - #10                 2 -     #15     - AAG GAC GTA GAG TCT GGG TTG TAT CTG ATC GA - #C CAT CTG AAG AAC CAA      785     Lys Asp Val Glu Ser Gly Leu Tyr Leu Ile As - #p His Leu Lys Asn Gln     #               230     - CCG GAG TTG GGT GGC TAT CAG ATC AGC ATT CC - #G CAA AAG GGC GTG GTG      833     Pro Glu Leu Gly Gly Tyr Gln Ile Ser Ile Pr - #o Gln Lys Gly Val Val     #           245     - GAT AAA CGC GGT AAA CGT AAA AAT CGA CCA GC - #C CGC AAG GCG AGC TTG      881     Asp Lys Arg Gly Lys Arg Lys Asn Arg Pro Al - #a Arg Lys Ala Ser Leu     #       260     - AGC CTG CGC AGT GGG CGC ATC ACG CTA AAA CA - #G GGG AAT ATC ACG CTC      929     Ser Leu Arg Ser Gly Arg Ile Thr Leu Lys Gl - #n Gly Asn Ile Thr Leu     #   275     - AAC GCG GTG CTG GCC GAG GAG ATT AAC CCG CC - #C AAG GGT GAG ACC CCG      977     Asn Ala Val Leu Ala Glu Glu Ile Asn Pro Pr - #o Lys Gly Glu Thr Pro     280                 2 - #85                 2 - #90                 2 -     #95     - TTG AAA TGG TTG TTG CTG ACC GGC GAA CCG GT - #C GAG TCG CTA GCC CAA     1025     Leu Lys Trp Leu Leu Leu Thr Gly Glu Pro Va - #l Glu Ser Leu Ala Gln     #               310     - GCC TTG CGC GTC ATC GAC ATT TAT ACC CAT CG - #C TGG CGG ATC GAG GAG     1073     Ala Leu Arg Val Ile Asp Ile Tyr Thr His Ar - #g Trp Arg Ile Glu Glu     #           325     - TTC CAT AAG GCA TGG AAA ACC GGA GCA GGA GC - #C GAG AGG CAA CGC ATG     1121     Phe His Lys Ala Trp Lys Thr Gly Ala Gly Al - #a Glu Arg Gln Arg Met     #       340     - GAG GAG CCG GAT AAT CTG GAG CGG ATG GTC TC - #G ATC CTC TCG TTT GTT     1169     Glu Glu Pro Asp Asn Leu Glu Arg Met Val Se - #r Ile Leu Ser Phe Val     #   355     - GCG GTC AGG CTG TTA CAG CTC AGA GAA AGC TT - #C ACG CCG CCG CAA GCA     1217     Ala Val Arg Leu Leu Gln Leu Arg Glu Ser Ph - #e Thr Pro Pro Gln Ala     360                 3 - #65                 3 - #70                 3 -     #75     - CTC AGG GCG CAA GGG CTG CTA AAG GAA GCG GA - #A CAC GTA GAA AGC CAG     1265     Leu Arg Ala Gln Gly Leu Leu Lys Glu Ala Gl - #u His Val Glu Ser Gln     #               390     - TCC GCA GAA ACG GTG CTG ACC CCG GAT GAA TG - #T CAG CTA CTG GGC TAT     1313     Ser Ala Glu Thr Val Leu Thr Pro Asp Glu Cy - #s Gln Leu Leu Gly Tyr     #           405     - CTG GAC AAG GGA AAA CGC AAG CGC AAA GAG AA - #A GCA GGT AGC TTG CAG     1361     Leu Asp Lys Gly Lys Arg Lys Arg Lys Glu Ly - #s Ala Gly Ser Leu Gln     #       420     - TGG GCT TAC ATG GCG ATA GCT AGA CTG GGC GG - #T TTT ATG GAC AGC AAG     1409     Trp Ala Tyr Met Ala Ile Ala Arg Leu Gly Gl - #y Phe Met Asp Ser Lys     #   435     - CGA ACC GGA ATT GCC AGC TGG GGC GCC CTC TG - #G GAA GGT TGG GAA GCC     1457     Arg Thr Gly Ile Ala Ser Trp Gly Ala Leu Tr - #p Glu Gly Trp Glu Ala     440                 4 - #45                 4 - #50                 4 -     #55     - CTG CAA AGT AAA CTG GAT GGC TTT CTT GCC GC - #C AAG GAT CTG ATG GCG     1505     Leu Gln Ser Lys Leu Asp Gly Phe Leu Ala Al - #a Lys Asp Leu Met Ala     #               470     #          1534    TC TGA TCAAGAGACA G     Gln Gly Ile Lys Ile  *                 475     - (2) INFORMATION FOR SEQ ID NO:2:     -      (i) SEQUENCE CHARACTERISTICS:               (A) LENGTH:  476 ami - #no acids               (B) TYPE: amino acid               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: protein     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2:     - Met Ile Thr Ser Ala Leu His Arg Ala Ala As - #p Trp Ala Lys Ser Val     #                 15     - Phe Ser Ser Ala Ala Leu Gly Asp Pro Arg Ar - #g Thr Ala Arg Leu Val     #             30     - Asn Val Ala Ala Gln Leu Ala Lys Tyr Ser Gl - #y Lys Ser Ile Thr Ile     #         45     - Ser Ser Glu Gly Ser Lys Ala Ala Gln Glu Gl - #y Ala Tyr Arg Phe Ile     #     60     - Arg Asn Pro Asn Val Ser Ala Glu Ala Ile Ar - #g Lys Ala Gly Ala Met     # 80     - Gln Thr Val Lys Leu Ala Gln Glu Phe Pro Gl - #u Leu Leu Ala Ile Glu     #                 95     - Asp Thr Thr Ser Leu Ser Tyr Arg His Gln Va - #l Ala Glu Glu Leu Gly     #           110     - Lys Leu Gly Ser Ile Gln Asp Lys Ser Arg Gl - #y Trp Trp Val His Ser     #       125     - Val Leu Leu Leu Glu Ala Thr Thr Phe Arg Th - #r Val Gly Leu Leu His     #   140     - Gln Glu Trp Trp Met Arg Pro Asp Asp Pro Al - #a Asp Ala Asp Glu Lys     145                 1 - #50                 1 - #55                 1 -     #60     - Glu Ser Gly Lys Trp Leu Ala Ala Ala Ala Th - #r Ser Arg Leu Arg Met     #               175     - Gly Ser Met Met Ser Asn Val Ile Ala Val Cy - #s Asp Arg Glu Ala Asp     #           190     - Ile His Ala Tyr Leu Gln Asp Arg Leu Ala Hi - #s Asn Glu Arg Phe Val     #       205     - Val Arg Ser Lys His Pro Arg Lys Asp Val Gl - #u Ser Gly Leu Tyr Leu     #   220     - Ile Asp His Leu Lys Asn Gln Pro Glu Leu Gl - #y Gly Tyr Gln Ile Ser     225                 2 - #30                 2 - #35                 2 -     #40     - Ile Pro Gln Lys Gly Val Val Asp Lys Arg Gl - #y Lys Arg Lys Asn Arg     #               255     - Pro Ala Arg Lys Ala Ser Leu Ser Leu Arg Se - #r Gly Arg Ile Thr Leu     #           270     - Lys Gln Gly Asn Ile Thr Leu Asn Ala Val Le - #u Ala Glu Glu Ile Asn     #       285     - Pro Pro Lys Gly Glu Thr Pro Leu Lys Trp Le - #u Leu Leu Thr Gly Glu     #   300     - Pro Val Glu Ser Leu Ala Gln Ala Leu Arg Va - #l Ile Asp Ile Tyr Thr     305                 3 - #10                 3 - #15                 3 -     #20     - His Arg Trp Arg Ile Glu Glu Phe His Lys Al - #a Trp Lys Thr Gly Ala     #               335     - Gly Ala Glu Arg Gln Arg Met Glu Glu Pro As - #p Asn Leu Glu Arg Met     #           350     - Val Ser Ile Leu Ser Phe Val Ala Val Arg Le - #u Leu Gln Leu Arg Glu     #       365     - Ser Phe Thr Pro Pro Gln Ala Leu Arg Ala Gl - #n Gly Leu Leu Lys Glu     #   380     - Ala Glu His Val Glu Ser Gln Ser Ala Glu Th - #r Val Leu Thr Pro Asp     385                 3 - #90                 3 - #95                 4 -     #00     - Glu Cys Gln Leu Leu Gly Tyr Leu Asp Lys Gl - #y Lys Arg Lys Arg Lys     #               415     - Glu Lys Ala Gly Ser Leu Gln Trp Ala Tyr Me - #t Ala Ile Ala Arg Leu     #           430     - Gly Gly Phe Met Asp Ser Lys Arg Thr Gly Il - #e Ala Ser Trp Gly Ala     #       445     - Leu Trp Glu Gly Trp Glu Ala Leu Gln Ser Ly - #s Leu Asp Gly Phe Leu     #   460     - Ala Ala Lys Asp Leu Met Ala Gln Gly Ile Ly - #s Ile     465                 4 - #70                 4 - #75     - (2) INFORMATION FOR SEQ ID NO:3:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 5838 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: circular     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Plasmid DNA"SCRIPTION: /desc     -    (vii) IMMEDIATE SOURCE:               (B) CLONE: pRZTL1     -     (ix) FEATURE:               (A) NAME/KEY: insertion.sub.-- - #seq               (B) LOCATION: 1..19     -     (ix) FEATURE:               (A) NAME/KEY: CDS               (B) LOCATION: 77..1267     #/function= "tetracycline resistance"     -     (ix) FEATURE:               (A) NAME/KEY: CDS     #(2301..2960) LOCATION: complement     #/function= "chloramphenicol resistance"     -     (ix) FEATURE:               (A) NAME/KEY: insertion.sub.-- - #seq               (B) LOCATION: 4564..4582     -     (ix) FEATURE:               (A) NAME/KEY: CDS               (B) LOCATION: 4715..5530     #/function= "kanamycin resistance"     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3:     - CTGACTCTTA TACACAAGTA AGCTTTAATG CGGTAGTTTA TCACAGTTAA AT - #TGCTAACG       60     #ATC GTC ATC CTC        109 TCT AAC AAT GCG CTC     #Met Lys Ser Asn Asn Ala Leu Ile Val Ile L - #eu     #        485     - GGC ACC GTC ACC CTG GAT GCT GTA GGC ATA GG - #C TTG GTT ATG CCG GTA      157     Gly Thr Val Thr Leu Asp Ala Val Gly Ile Gl - #y Leu Val Met Pro Val     #   500     - CTG CCG GGC CTC TTG CGG GAT ATC GTC CAT TC - #C GAC AGC ATC GCC AGT      205     Leu Pro Gly Leu Leu Arg Asp Ile Val His Se - #r Asp Ser Ile Ala Ser     505                 5 - #10                 5 - #15                 5 -     #20     - CAC TAT GGC GTG CTG CTA GCG CTA TAT GCG TT - #G ATG CAA TTT CTA TGC      253     His Tyr Gly Val Leu Leu Ala Leu Tyr Ala Le - #u Met Gln Phe Leu Cys     #               535     - GCA CCC GTT CTC GGA GCA CTG TCC GAC CGC TT - #T GGC CGC CGC CCA GTC      301     Ala Pro Val Leu Gly Ala Leu Ser Asp Arg Ph - #e Gly Arg Arg Pro Val     #           550     - CTG CTC GCT TCG CTA CTT GGA GCC ACT ATC GA - #C TAC GCG ATC ATG GCG      349     Leu Leu Ala Ser Leu Leu Gly Ala Thr Ile As - #p Tyr Ala Ile Met Ala     #       565     - ACC ACA CCC GTC CTG TGG ATC CTC TAC GCC GG - #A CGC ATC GTG GCC GGC      397     Thr Thr Pro Val Leu Trp Ile Leu Tyr Ala Gl - #y Arg Ile Val Ala Gly     #   580     - ATC ACC GGC GCC ACA GGT GCG GTT GCT GGC GC - #C TAT ATC GCC GAC ATC      445     Ile Thr Gly Ala Thr Gly Ala Val Ala Gly Al - #a Tyr Ile Ala Asp Ile     585                 5 - #90                 5 - #95                 6 -     #00     - ACC GAT GGG GAA GAT CGG GCT CGC CAC TTC GG - #G CTC ATG AGC GCT TGT      493     Thr Asp Gly Glu Asp Arg Ala Arg His Phe Gl - #y Leu Met Ser Ala Cys     #               615     - TTC GGC GTG GGT ATG GTG GCA GGC CCC GTG GC - #C GGG GGA CTG TTG GGC      541     Phe Gly Val Gly Met Val Ala Gly Pro Val Al - #a Gly Gly Leu Leu Gly     #           630     - GCC ATC TCC TTG CAT GCA CCA TTC CTT GCG GC - #G GCG GTG CTC AAC GGC      589     Ala Ile Ser Leu His Ala Pro Phe Leu Ala Al - #a Ala Val Leu Asn Gly     #       645     - CTC AAC CTA CTA CTG GGC TGC TTC CTA ATG CA - #G GAG TCG CAT AAG GGA      637     Leu Asn Leu Leu Leu Gly Cys Phe Leu Met Gl - #n Glu Ser His Lys Gly     #   660     - GAG CGT CGA CCG ATG CCC TTG AGA GCC TTC AA - #C CCA GTC AGC TCC TTC      685     Glu Arg Arg Pro Met Pro Leu Arg Ala Phe As - #n Pro Val Ser Ser Phe     665                 6 - #70                 6 - #75                 6 -     #80     - CGG TGG GCG CGG GGC ATG ACT ATC GTC GCC GC - #A CTT ATG ACT GTC TTC      733     Arg Trp Ala Arg Gly Met Thr Ile Val Ala Al - #a Leu Met Thr Val Phe     #               695     - TTT ATC ATG CAA CTC GTA GGA CAG GTG CCG GC - #A GCG CTC TGG GTC ATT      781     Phe Ile Met Gln Leu Val Gly Gln Val Pro Al - #a Ala Leu Trp Val Ile     #           710     - TTC GGC GAG GAC CGC TTT CGC TGG AGC GCG AC - #G ATG ATC GGC CTG TCG      829     Phe Gly Glu Asp Arg Phe Arg Trp Ser Ala Th - #r Met Ile Gly Leu Ser     #       725     - CTT GCG GTA TTC GGA ATC TTG CAC GCC CTC GC - #T CAA GCC TTC GTC ACT      877     Leu Ala Val Phe Gly Ile Leu His Ala Leu Al - #a Gln Ala Phe Val Thr     #   740     - GGT CCC GCC ACC AAA CGT TTC GGC GAG AAG CA - #G GCC ATT ATC GCC GGC      925     Gly Pro Ala Thr Lys Arg Phe Gly Glu Lys Gl - #n Ala Ile Ile Ala Gly     745                 7 - #50                 7 - #55                 7 -     #60     - ATG GCG GCC GAC GCG CTG GGC TAC GTC TTG CT - #G GCG TTC GCG ACG CGA      973     Met Ala Ala Asp Ala Leu Gly Tyr Val Leu Le - #u Ala Phe Ala Thr Arg     #               775     - GGC TGG ATG GCC TTC CCC ATT ATG ATT CTT CT - #C GCT TCC GGC GGC ATC     1021     Gly Trp Met Ala Phe Pro Ile Met Ile Leu Le - #u Ala Ser Gly Gly Ile     #           790     - GGG ATG CCC GCG TTG CAG GCC ATG CTG TCC AG - #G CAG GTA GAT GAC GAC     1069     Gly Met Pro Ala Leu Gln Ala Met Leu Ser Ar - #g Gln Val Asp Asp Asp     #       805     - CAT CAG GGA CAG CTT CAA GGA TCG CTC GCG GC - #T CTT ACC AGC CTA ACT     1117     His Gln Gly Gln Leu Gln Gly Ser Leu Ala Al - #a Leu Thr Ser Leu Thr     #   820     - TCG ATC ACT GGA CCG CTG ATC GTC ACG GCG AT - #T TAT GCC GCC TCG GCG     1165     Ser Ile Thr Gly Pro Leu Ile Val Thr Ala Il - #e Tyr Ala Ala Ser Ala     825                 8 - #30                 8 - #35                 8 -     #40     - AGC ACA TGG AAC GGG TTG GCA TGG ATT GTA GG - #C GCC GCC CTA TAC CTT     1213     Ser Thr Trp Asn Gly Leu Ala Trp Ile Val Gl - #y Ala Ala Leu Tyr Leu     #               855     - GTC TGC CTC CCC GCG TTG CGT CGC GGT GCA TG - #G AGC CGG GCC ACC TCG     1261     Val Cys Leu Pro Ala Leu Arg Arg Gly Ala Tr - #p Ser Arg Ala Thr Ser     #           870     - ACC TGA ATGGAAGCCG GCGGCACCTC GCTAACGGAT TCACCACTCC AA - #GAATTGGA     1317     Thr  *     GCCAATCAAT TCTTGCGGAG AACTGTGAAT GCGCAAACCA ACCCTTGGCA GA - #ACATATCC     1377     - ATCGCGTCCG CCATCTCCAG CAGCCGCACG CGGCGCATCT CGGGCAGCGT TG - #GGTCCTGG     1437     - CCACGGGTGC GCATGATCGT GCTCCTGTCG TTGAGGACCC GGCTAGGCTG GC - #GGGGTTGC     1497     - CTTACTGGTT AGCAGAATGA ATCACCGATA CGCGAGCGAA CGTGAAGCGA CT - #GCTGCTGC     1557     - AAAACGTCTG CGACCTGAGC AACAACATGA ATGGTCTTCG GTTTCCGTGT TT - #CGTAAAGT     1617     - CTGGAAACGC GGAAGTCCCC TACGTGCTGC TGAAGTTGCC CGCAACAGAG AG - #TGGAACCA     1677     - ACCGGTGATA CCACGATACT ATGACTGAGA GTCAACGCCA TGAGCGGCCT CA - #TTTCTTAT     1737     - TCTGAGTTAC AACAGTCCGC ACCGCTGTCC GGTAGCTCCT TCCGGTGGGC GC - #GGGGCATG     1797     - ACTATCGTCG CCGCACTTAT GACTGTCTTC TTTATCATGC AACTCGTAGG AC - #AGGTGCCG     1857     - GCAGCGCCCA ACAGTCCCCC GGCCACGGGG CCTGCCACCA TACCCACGCC GA - #AACAAGCG     1917     - CCCTGCACCA TTATGTTCCG GATCTGCATC GCAGGATGCT GCTGGCTACC CT - #GTGGAACA     1977     - CCTACATCTG TATTAACGAA GCGCTAACCG TTTTTATCAG GCTCTGGGAG GC - #AGAATAAA     2037     - TGATCATATC GTCAATTATT ACCTCCACGG GGAGAGCCTG AGCAAACTGG CC - #TCAGGCAT     2097     - TTGAGAAGCA CACGGTCACA CTGCTTCCGG TAGTCAATAA ACCGGTAAAC CA - #GCAATAGA     2157     - CATAAGCGGC TATTTAACGA CCCTGCCCTG AACCGACGAC CGGGTCGAAT TT - #GCTTTCGA     2217     - ATTTCTGCCA TTCATCCGCT TATTATCAAT TATTCAGGCG TAGCACCAGG CG - #TTTAAGGG     2277     - CACCAATAAC TGCCTTAAAA AAATTACGCC CCGCCCTGCC ACTCATCGCA GT - #ACTGTTGT     2337     - AATTCATTAA GCATTCTGCC GACATGGAAG CCATCACAGA CGGCATGATG AA - #CCTGAATC     2397     - GCCAGCGGCA TCAGCACCTT GTCGCCTTGC GTATAATATT TGCCCATGGT GA - #AAACGGGG     2457     - GCGAAGAAGT TGTCCATATT GGCCACGTTT AAATCAAAAC TGGTGAAACT CA - #CCCAGGGA     2517     - TTGGCTGAGA CGAAAAACAT ATTCTCAATA AACCCTTTAG GGAAATAGGC CA - #GGTTTTCA     2577     - CCGTAACACG CCACATCTTG CGAATATATG TGTAGAAACT GCCGGAAATC GT - #CGTGGTAT     2637     - TCACTCCAGA GCGATGAAAA CGTTTCAGTT TGCTCATGGA AAACGGTGTA AC - #AAGGGTGA     2697     - ACACTATCCC ATATCACCAG CTCACCGTCT TTCATTGCCA TACGGAATTC CG - #GATGAGCA     2757     - TTCATCAGGC GGGCAAGAAT GTGAATAAAG GCCGGATAAA ACTTGTGCTT AT - #TTTTCTTT     2817     - ACGGTCTTTA AAAAGGCCGT AATATCCAGC TGAACGGTCT GGTTATAGGT AC - #ATTGAGCA     2877     - ACTGACTGAA ATGCCTCAAA ATGTTCTTTA CGATGCCATT GGGATATATC AA - #CGGTGGTA     2937     - TATCCAGTGA TTTTTTTCTC CATTTTAGCT TCCTTAGCTC CTGAAAATCT CG - #ATAACTCA     2997     - AAAAATACGC CCGGTAGTGA TCTTATTTCA TTATGGTGAA AGTTGGAACC TC - #TTACGTGC     3057     - CGATCAACGT CTCATTTTCG CCAAAAGTTG GCCCAGGGCT TCCCGGTATC AA - #CAGGGACA     3117     - CCAGGATTTA TTTATTCTGC GAAGTGATCT TCCGTCACAG GTATTTATTC GG - #CGCAAAGT     3177     - GCGTCGGGTG ATGCTGCCAA CTTACTGATT TAGTGTATGA TGGTGTTTTT GA - #GGTGCTCC     3237     - AGTGGCTTCT GTTTCTATCA GCTGTCCCTC CTGTTCAGCT ACTGACGGGG TG - #GTGCGTAA     3297     - CGGCAAAAGC ACCGCCGGAC ATCAGCGCTA GCGGAGTGTA TACTGGCTTA CT - #ATGTTGGC     3357     - ACTGATGAGG GTGTCAGTGA AGTGCTTCAT GTGGCAGGAG AAAAAAGGCT GC - #ACCGGTGC     3417     - GTCAGCAGAA TATGTGATAC AGGATATATT CCGCTTCCTC GCTCACTGAC TC - #GCTACGCT     3477     - CGGTCGTTCG ACTGCGGCGA GCGGAAATGG CTTACGAACG GGGCGGAGAT TT - #CCTGGAAG     3537     - ATGCCAGGAA GATACTTAAC AGGGAAGTGA GAGGGCCGCG GCAAAGCCGT TT - #TTCCATAG     3597     - GCTCCGCCCC CCTGACAAGC ATCACGAAAT CTGACGCTCA AATCAGTGGT GG - #CGAAACCC     3657     - GACAGGACTA TAAAGATACC AGGCGTTTCC CCTGGCGGCT CCCTCGTGCG CT - #CTCCTGTT     3717     - CCTGCCTTTC GGTTTACCGG TGTCATTCCG CTGTTATGGC CGCGTTTGTC TC - #ATTCCACG     3777     - CCTGACACTC AGTTCCGGGT AGGCAGTTCG CTCCAAGCTG GACTGTATGC AC - #GAACCCCC     3837     - CGTTCAGTCC GACCGCTGCG CCTTATCCGG TAACTATCGT CTTGAGTCCA AC - #CCGGAAAG     3897     - ACATGCAAAA GCACCACTGG CAGCAGCCAC TGGTAATTGA TTTAGAGGAG TT - #AGTCTTGA     3957     - AGTCATGCGC CGGTTAAGGC TAAACTGAAA GGACAAGTTT TGGTGACTGC GC - #TCCTCCAA     4017     - GCCAGTTACC TCGGTTCAAA GAGTTGGTAG CTCAGAGAAC CTTCGAAAAA CC - #GCCCTGCA     4077     - AGGCGGTTTT TTCGTTTTCA GAGCAAGAGA TTACGCGCAG ACCAAAACGA TC - #TCAAGAAG     4137     - ATCATCTTAT TAATCAGATA AAATATTTCT AGAGGTGAAC CATCACCCTA AT - #CAAGTTTT     4197     - TTGGGGTCGA GGTGCCGTAA AGCACTAAAT CGGAACCCTA AAGGGATGCC CC - #GATTTAGA     4257     - GCTTGACGGG GAAAGCCGGC GAACGTGGCG AGAAAGGAAG GGAAGAAAGC GA - #AAGGAGCG     4317     - GGCGCTAGGG CGCTGGCAAG TGTAGCGGTC ACGCTGCGCG TAACCACCAC AC - #CCGCCGCG     4377     - CTTAATGCGC CGCTACAGCG CCATTCGCCA TTCAGGCTGC GCAACTGTTG GG - #AAGGGCGA     4437     - TCGGTGCGGG CCTCTTCGCT ATTACGCCAG CTGGCGAAAG GGGGATGTGC TG - #CAAGGCGA     4497     - TTAAGTTGGG TAACGCCAGG GTTTTCCCAG TCACGACGTT GTAAAACGAC GG - #CCAGTGCC     4557     - AAGCTTACTT GTGTATAAGA GTCAGTCGAC CTGCAGGGGG GGGGGGGAAA GC - #CACGTTGT     4617     - GTCTCAAAAT CTCTGATGTT ACATTGCACA AGATAAAAAT ATATCATCAT GA - #ACAATAAA     4677     #ATT CAA CGG    4732ACA GTAATACAAG GGGTGTT ATG AGC CAT     #     Met Ser His Ile Gln Arg     #    5  1     - GAA ACG TCT TGC TCG AGG CCG CGA TTA AAT TC - #C AAC ATG GAT GCT GAT     4780     Glu Thr Ser Cys Ser Arg Pro Arg Leu Asn Se - #r Asn Met Asp Ala Asp     #             20     - TTA TAT GGG TAT AAA TGG GCT CGC GAT AAT GT - #C GGG CAA TCA GGT GCG     4828     Leu Tyr Gly Tyr Lys Trp Ala Arg Asp Asn Va - #l Gly Gln Ser Gly Ala     #         35     - ACA ATC TAT CGA TTG TAT GGG AAG CCC GAT GC - #G CCA GAG TTG TTT CTG     4876     Thr Ile Tyr Arg Leu Tyr Gly Lys Pro Asp Al - #a Pro Glu Leu Phe Leu     #     50     - AAA CAT GGC AAA GGT AGC GTT GCC AAT GAT GT - #T ACA GAT GAG ATG GTC     4924     Lys His Gly Lys Gly Ser Val Ala Asn Asp Va - #l Thr Asp Glu Met Val     # 70     - AGA CTA AAC TGG CTG ACG GAA TTT ATG CCT CT - #T CCG ACC ATC AAG CAT     4972     Arg Leu Asn Trp Leu Thr Glu Phe Met Pro Le - #u Pro Thr Ile Lys His     #                 85     - TTT ATC CGT ACT CCT GAT GAT GCA TGG TTA CT - #C ACC ACT GCG ATC CCC     5020     Phe Ile Arg Thr Pro Asp Asp Ala Trp Leu Le - #u Thr Thr Ala Ile Pro     #            100     - GGG AAA ACA GCA TTC CAG GTA TTA GAA GAA TA - #T CCT GAT TCA GGT GAA     5068     Gly Lys Thr Ala Phe Gln Val Leu Glu Glu Ty - #r Pro Asp Ser Gly Glu     #       115     - AAT ATT GTT GAT GCG CTG GCA GTG TTC CTG CG - #C CGG TTG CAT TCG ATT     5116     Asn Ile Val Asp Ala Leu Ala Val Phe Leu Ar - #g Arg Leu His Ser Ile     #   130     - CCT GTT TGT AAT TGT CCT TTT AAC AGC GAT CG - #C GTA TTT CGT CTC GCT     5164     Pro Val Cys Asn Cys Pro Phe Asn Ser Asp Ar - #g Val Phe Arg Leu Ala     135                 1 - #40                 1 - #45                 1 -     #50     - CAG GCG CAA TCA CGA ATG AAT AAC GGT TTG GT - #T GAT GCG AGT GAT TTT     5212     Gln Ala Gln Ser Arg Met Asn Asn Gly Leu Va - #l Asp Ala Ser Asp Phe     #               165     - GAT GAC GAG CGT AAT GGC TGG CCT GTT GAA CA - #A GTC TGG AAA GAA ATG     5260     Asp Asp Glu Arg Asn Gly Trp Pro Val Glu Gl - #n Val Trp Lys Glu Met     #           180     - CAT AAG CTT TTG CCA TTC TCA CCG GAT TCA GT - #C GTC ACT CAT GGT GAT     5308     His Lys Leu Leu Pro Phe Ser Pro Asp Ser Va - #l Val Thr His Gly Asp     #       195     - TTC TCA CTT GAT AAC CTT ATT TTT GAC GAG GG - #G AAA TTA ATA GGT TGT     5356     Phe Ser Leu Asp Asn Leu Ile Phe Asp Glu Gl - #y Lys Leu Ile Gly Cys     #   210     - ATT GAT GTT GGA CGA GTC GGA ATC GCA GAC CG - #A TAC CAG GAT CTT GCC     5404     Ile Asp Val Gly Arg Val Gly Ile Ala Asp Ar - #g Tyr Gln Asp Leu Ala     215                 2 - #20                 2 - #25                 2 -     #30     - ATC CTA TGG AAC TGC CTC GGT GAG TTT TCT CC - #T TCA TTA CAG AAA CGG     5452     Ile Leu Trp Asn Cys Leu Gly Glu Phe Ser Pr - #o Ser Leu Gln Lys Arg     #               245     - CTT TTT CAA AAA TAT GGT ATT GAT AAT CCT GA - #T ATG AAT AAA TTG CAG     5500     Leu Phe Gln Lys Tyr Gly Ile Asp Asn Pro As - #p Met Asn Lys Leu Gln     #           260     - TTT CAT TTG ATG CTC GAT GAG TTT TTC TAA TC - #AGAATTGG TTAATTGGTT     5550     Phe His Leu Met Leu Asp Glu Phe Phe  *     #       270     - GTAACACTGG CAGAGCATTA CGCTGACTTG ACGGGACGGC GGCTTTGTTG AA - #TAAATCGA     5610     - ACTTTTGCTG AGTTGAAGGA TCAGATCACG CATCTTCCCG ACAACGCAGA CC - #GTTCCGTG     5670     - GCAAAGCAAA AGTTCAAAAT CACCAACTGG TCCACCTACA ACAAAGCTCT CA - #TCAACCGT     5730     - GGCTCCCTCA CTTTCTGGCT GGATGATGGG GCGATTCAGG CCTGGTATGA GT - #CAGCAACA     5790     #              5838GACC TCAGCGCCCC CCCCCCCCTG CAGGTCGA     - (2) INFORMATION FOR SEQ ID NO:4:     -      (i) SEQUENCE CHARACTERISTICS:               (A) LENGTH:  396 ami - #no acids               (B) TYPE: amino acid               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: protein     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4:     - Met Lys Ser Asn Asn Ala Leu Ile Val Ile Le - #u Gly Thr Val Thr Leu     #                 15     - Asp Ala Val Gly Ile Gly Leu Val Met Pro Va - #l Leu Pro Gly Leu Leu     #             30     - Arg Asp Ile Val His Ser Asp Ser Ile Ala Se - #r His Tyr Gly Val Leu     #         45     - Leu Ala Leu Tyr Ala Leu Met Gln Phe Leu Cy - #s Ala Pro Val Leu Gly     #     60     - Ala Leu Ser Asp Arg Phe Gly Arg Arg Pro Va - #l Leu Leu Ala Ser Leu     # 80     - Leu Gly Ala Thr Ile Asp Tyr Ala Ile Met Al - #a Thr Thr Pro Val Leu     #                 95     - Trp Ile Leu Tyr Ala Gly Arg Ile Val Ala Gl - #y Ile Thr Gly Ala Thr     #           110     - Gly Ala Val Ala Gly Ala Tyr Ile Ala Asp Il - #e Thr Asp Gly Glu Asp     #       125     - Arg Ala Arg His Phe Gly Leu Met Ser Ala Cy - #s Phe Gly Val Gly Met     #   140     - Val Ala Gly Pro Val Ala Gly Gly Leu Leu Gl - #y Ala Ile Ser Leu His     145                 1 - #50                 1 - #55                 1 -     #60     - Ala Pro Phe Leu Ala Ala Ala Val Leu Asn Gl - #y Leu Asn Leu Leu Leu     #               175     - Gly Cys Phe Leu Met Gln Glu Ser His Lys Gl - #y Glu Arg Arg Pro Met     #           190     - Pro Leu Arg Ala Phe Asn Pro Val Ser Ser Ph - #e Arg Trp Ala Arg Gly     #       205     - Met Thr Ile Val Ala Ala Leu Met Thr Val Ph - #e Phe Ile Met Gln Leu     #   220     - Val Gly Gln Val Pro Ala Ala Leu Trp Val Il - #e Phe Gly Glu Asp Arg     225                 2 - #30                 2 - #35                 2 -     #40     - Phe Arg Trp Ser Ala Thr Met Ile Gly Leu Se - #r Leu Ala Val Phe Gly     #               255     - Ile Leu His Ala Leu Ala Gln Ala Phe Val Th - #r Gly Pro Ala Thr Lys     #           270     - Arg Phe Gly Glu Lys Gln Ala Ile Ile Ala Gl - #y Met Ala Ala Asp Ala     #       285     - Leu Gly Tyr Val Leu Leu Ala Phe Ala Thr Ar - #g Gly Trp Met Ala Phe     #   300     - Pro Ile Met Ile Leu Leu Ala Ser Gly Gly Il - #e Gly Met Pro Ala Leu     305                 3 - #10                 3 - #15                 3 -     #20     - Gln Ala Met Leu Ser Arg Gln Val Asp Asp As - #p His Gln Gly Gln Leu     #               335     - Gln Gly Ser Leu Ala Ala Leu Thr Ser Leu Th - #r Ser Ile Thr Gly Pro     #           350     - Leu Ile Val Thr Ala Ile Tyr Ala Ala Ser Al - #a Ser Thr Trp Asn Gly     #       365     - Leu Ala Trp Ile Val Gly Ala Ala Leu Tyr Le - #u Val Cys Leu Pro Ala     #   380     - Leu Arg Arg Gly Ala Trp Ser Arg Ala Thr Se - #r Thr     385                 3 - #90                 3 - #95     - (2) INFORMATION FOR SEQ ID NO:5:     -      (i) SEQUENCE CHARACTERISTICS:               (A) LENGTH:  219 ami - #no acids               (B) TYPE: amino acid               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: protein     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5:     - Met Glu Lys Lys Ile Thr Gly Tyr Thr Thr Va - #l Asp Ile Ser Gln Trp     #                 15     - His Arg Lys Glu His Phe Glu Ala Phe Gln Se - #r Val Ala Gln Cys Thr     #             30     - Tyr Asn Gln Thr Val Gln Leu Asp Ile Thr Al - #a Phe Leu Lys Thr Val     #         45     - Lys Lys Asn Lys His Lys Phe Tyr Pro Ala Ph - #e Ile His Ile Leu Ala     #     60     - Arg Leu Met Asn Ala His Pro Glu Phe Arg Me - #t Ala Met Lys Asp Gly     # 80     - Glu Leu Val Ile Trp Asp Ser Val His Pro Cy - #s Tyr Thr Val Phe His     #                 95     - Glu Gln Thr Glu Thr Phe Ser Ser Leu Trp Se - #r Glu Tyr His Asp Asp     #           110     - Phe Arg Gln Phe Leu His Ile Tyr Ser Gln As - #p Val Ala Cys Tyr Gly     #       125     - Glu Asn Leu Ala Tyr Phe Pro Lys Gly Phe Il - #e Glu Asn Met Phe Phe     #   140     - Val Ser Ala Asn Pro Trp Val Ser Phe Thr Se - #r Phe Asp Leu Asn Val     145                 1 - #50                 1 - #55                 1 -     #60     - Ala Asn Met Asp Asn Phe Phe Ala Pro Val Ph - #e Thr Met Gly Lys Tyr     #               175     - Tyr Thr Gln Gly Asp Lys Val Leu Met Pro Le - #u Ala Ile Gln Val His     #           190     - His Ala Val Cys Asp Gly Phe His Val Gly Ar - #g Met Leu Asn Glu Leu     #       205     - Gln Gln Tyr Cys Asp Glu Trp Gln Gly Gly Al - #a     #   220     - (2) INFORMATION FOR SEQ ID NO:6:     -      (i) SEQUENCE CHARACTERISTICS:               (A) LENGTH:  271 ami - #no acids               (B) TYPE: amino acid               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: protein     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6:     - Met Ser His Ile Gln Arg Glu Thr Ser Cys Se - #r Arg Pro Arg Leu Asn     #                 15     - Ser Asn Met Asp Ala Asp Leu Tyr Gly Tyr Ly - #s Trp Ala Arg Asp Asn     #             30     - Val Gly Gln Ser Gly Ala Thr Ile Tyr Arg Le - #u Tyr Gly Lys Pro Asp     #         45     - Ala Pro Glu Leu Phe Leu Lys His Gly Lys Gl - #y Ser Val Ala Asn Asp     #     60     - Val Thr Asp Glu Met Val Arg Leu Asn Trp Le - #u Thr Glu Phe Met Pro     # 80     - Leu Pro Thr Ile Lys His Phe Ile Arg Thr Pr - #o Asp Asp Ala Trp Leu     #                 95     - Leu Thr Thr Ala Ile Pro Gly Lys Thr Ala Ph - #e Gln Val Leu Glu Glu     #           110     - Tyr Pro Asp Ser Gly Glu Asn Ile Val Asp Al - #a Leu Ala Val Phe Leu     #       125     - Arg Arg Leu His Ser Ile Pro Val Cys Asn Cy - #s Pro Phe Asn Ser Asp     #   140     - Arg Val Phe Arg Leu Ala Gln Ala Gln Ser Ar - #g Met Asn Asn Gly Leu     145                 1 - #50                 1 - #55                 1 -     #60     - Val Asp Ala Ser Asp Phe Asp Asp Glu Arg As - #n Gly Trp Pro Val Glu     #               175     - Gln Val Trp Lys Glu Met His Lys Leu Leu Pr - #o Phe Ser Pro Asp Ser     #           190     - Val Val Thr His Gly Asp Phe Ser Leu Asp As - #n Leu Ile Phe Asp Glu     #       205     - Gly Lys Leu Ile Gly Cys Ile Asp Val Gly Ar - #g Val Gly Ile Ala Asp     #   220     - Arg Tyr Gln Asp Leu Ala Ile Leu Trp Asn Cy - #s Leu Gly Glu Phe Ser     225                 2 - #30                 2 - #35                 2 -     #40     - Pro Ser Leu Gln Lys Arg Leu Phe Gln Lys Ty - #r Gly Ile Asp Asn Pro     #               255     - Asp Met Asn Lys Leu Gln Phe His Leu Met Le - #u Asp Glu Phe Phe     #           270     - (2) INFORMATION FOR SEQ ID NO:7:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 19 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Tn5 wild type outside end"sc     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:7:     # 19               AGT     - (2) INFORMATION FOR SEQ ID NO:8:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 19 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Tn5 mutant outside end"/desc     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:8:     # 19               TCT     - (2) INFORMATION FOR SEQ ID NO:9:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 19 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Tn5 mutant outside end"/desc     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:9:     # 19               TCT     - (2) INFORMATION FOR SEQ ID NO:10:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 19 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: linear     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Tn5 wild type inside end"esc     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:10:     # 19               TCT     - (2) INFORMATION FOR SEQ ID NO:11:     -      (i) SEQUENCE CHARACTERISTICS:     #pairs    (A) LENGTH: 19182 base               (B) TYPE: nucleic acid               (C) STRANDEDNESS: double               (D) TOPOLOGY: circular     -     (ii) MOLECULE TYPE: other nucleic acid     #= "Plasmid pRZ4196"PTION: /desc     -     (ix) FEATURE:               (A) NAME/KEY: repeat.sub.-- - #unit               (B) LOCATION: 94..112     #/note= "Wild type OE sequence":     -     (ix) FEATURE:               (A) NAME/KEY: repeat.sub.-- - #unit               (B) LOCATION: 12184..12225     #/note= "Cassette IE"NFORMATION:     -     (xi) SEQUENCE DESCRIPTION: SEQ ID NO:11:     - TTCCTGTAAC AATAGCAATA CCCCAAATAC CTAATGTAGT TCCAGCAAGC AA - #GCTAAAAA       60     - GTAAAGCAAC AACATAACTC ACCCCTGCAT CTGCTGACTC TTATACACAA GT - #AGCGTCCC      120     - GGGATCGGGA TCCCGTCGTT TTACAACGTC GTGACTGGGA AAACCCTGGC GT - #TACCCAAC      180     - TTAATCGCCT TGCAGCACAT CCCCCTTTCG CCAGCTGGCG TAATAGCGAA GA - #GGCCCGCA      240     - CCGATCGCCC TTCCCAACAG TTGCGCAGCC TGAATGGCGA ATGGCGCTTT GC - #CTGGTTTC      300     - CGGCACCAGA AGCGGTGCCG GAAAGCTGGC TGGAGTGCGA TCTTCCTGAG GC - #CGATACTG      360     - TCGTCGTCCC CTCAAACTGG CAGATGCACG GTTACGATGC GCCCATCTAC AC - #CAACGTAA      420     - CCTATCCCAT TACGGTCAAT CCGCCGTTTG TTCCCACGGA GAATCCGACG GG - #TTGTTACT      480     - CGCTCACATT TAATGTTGAT GAAAGCTGGC TACAGGAAGG CCAGACGCGA AT - #TATTTTTG      540     - ATGGCGTTAA CTCGGCGTTT CATCTGTGGT GCAACGGGCG CTGGGTCGGT TA - #CGGCCAGG      600     - ACAGTCGTTT GCCGTCTGAA TTTGACCTGA GCGCATTTTT ACGCGCCGGA GA - #AAACCGCC      660     - TCGCGGTGAT GGTGCTGCGT TGGAGTGACG GCAGTTATCT GGAAGATCAG GA - #TATGTGGC      720     - GGATGAGCGG CATTTTCCGT GACGTCTCGT TGCTGCATAA ACCGACTACA CA - #AATCAGCG      780     - ATTTCCATGT TGCCACTCGC TTTAATGATG ATTTCAGCCG CGCTGTACTG GA - #GGCTGAAG      840     - TTCAGATGTG CGGCGAGTTG CGTGACTACC TACGGGTAAC AGTTTCTTTA TG - #GCAGGGTG      900     - AAACGCAGGT CGCCAGCGGC ACCGCGCCTT TCGGCGGTGA AATTATCGAT GA - #GCGTGGTG      960     - GTTATGCCGA TCGCGTCACA CTACGTCTGA ACGTCGAAAA CCCGAAACTG TG - #GAGCGCCG     1020     - AAATCCCGAA TCTCTATCGT GCGGTGGTTG AACTGCACAC CGCCGACGGC AC - #GCTGATTG     1080     - AAGCAGAAGC CTGCGATGTC GGTTTCCGCG AGGTGCGGAT TGAAAATGGT CT - #GCTGCTGC     1140     - TGAACGGCAA GCCGTTGCTG ATTCGAGGCG TTAACCGTCA CGAGCATCAT CC - #TCTGCATG     1200     - GTCAGGTCAT GGATGAGCAG ACGATGGTGC AGGATATCCT GCTGATGAAG CA - #GAACAACT     1260     - TTAACGCCGT GCGCTGTTCG CATTATCCGA ACCATCCGCT GTGGTACACG CT - #GTGCGACC     1320     - GCTACGGCCT GTATGTGGTG GATGAAGCCA ATATTGAAAC CCACGGCATG GT - #GCCAATGA     1380     - ATCGTCTGAC CGATGATCCG CGCTGGCTAC CGGCGATGAG CGAACGCGTA AC - #GCGAATGG     1440     - TGCAGCGCGA TCGTAATCAC CCGAGTGTGA TCATCTGGTC GCTGGGGAAT GA - #ATCAGGCC     1500     - ACGGCGCTAA TCACGACGCG CTGTATCGCT GGATCAAATC TGTCGATCCT TC - #CCGCCCGG     1560     - TGCAGTATGA AGGCGGCGGA GCCGACACCA CGGCCACCGA TATTATTTGC CC - #GATGTACG     1620     - CGCGCGTGGA TGAAGACCAG CCCTTCCCGG CTGTGCCGAA ATGGTCCATC AA - #AAAATGGC     1680     - TTTCGCTACC TGGAGAGACG CGCCCGCTGA TCCTTTGCGA ATACGCCCAC GC - #GATGGGTA     1740     - ACAGTCTTGG CGGTTTCGCT AAATACTGGC AGGCGTTTCG TCAGTATCCC CG - #TTTACAGG     1800     - GCGGCTTCGT CTGGGACTGG GTGGATCAGT CGCTGATTAA ATATGATGAA AA - #CGGCAACC     1860     - CGTGGTCGGC TTACGGCGGT GATTTTGGCG ATACGCCGAA CGATCGCCAG TT - #CTGTATGA     1920     - ACGGTCTGGT CTTTGCCGAC CGCACGCCGC ATCCAGCGCT GACGGAAGCA AA - #ACACCAGC     1980     - AGCAGTTTTT CCAGTTCCGT TTATCCGGGC AAACCATCGA AGTGACCAGC GA - #ATACCTGT     2040     - TCCGTCATAG CGATAACGAG CTCCTGCACT GGATGGTGGC GCTGGATGGT AA - #GCCGCTGG     2100     - CAAGCGGTGA AGTGCCTCTG GATGTCGCTC CACAAGGTAA ACAGTTGATT GA - #ACTGCCTG     2160     - AACTACCGCA GCCGGAGAGC GCCGGGCAAC TCTGGCTCAC AGTACGCGTA GT - #GCAACCGA     2220     - ACGCGACCGC ATGGTCAGAA GCCGGGCACA TCAGCGCCTG GCAGCAGTGG CG - #TCTGGCGG     2280     - AAAACCTCAG TGTGACGCTC CCCGCCGCGT CCCACGCCAT CCCGCATCTG AC - #CACCAGCG     2340     - AAATGGATTT TTGCATCGAG CTGGGTAATA AGCGTTGGCA ATTTAACCGC CA - #GTCAGGCT     2400     - TTCTTTCACA GATGTGGATT GGCGATAAAA AACAACTGCT GACGCCGCTG CG - #CGATCAGT     2460     - TCACCCGTGC ACCGCTGGAT AACGACATTG GCGTAAGTGA AGCGACCCGC AT - #TGACCCTA     2520     - ACGCCTGGGT CGAACGCTGG AAGGCGGCGG GCCATTACCA GGCCGAAGCA GC - #GTTGTTGC     2580     - AGTGCACGGC AGATACACTT GCTGATGCGG TGCTGATTAC GACCGCTCAC GC - #GTGGCAGC     2640     - ATCAGGGGAA AACCTTATTT ATCAGCCGGA AAACCTACCG GATTGATGGT AG - #TGGTCAAA     2700     - TGGCGATTAC CGTTGATGTT GAAGTGGCGA GCGATACACC GCATCCGGCG CG - #GATTGGCC     2760     - TGAACTGCCA GCTGGCGCAG GTAGCAGAGC GGGTAAACTG GCTCGGATTA GG - #GCCGCAAG     2820     - AAAACTATCC CGACCGCCTT ACTGCCGCCT GTTTTGACCG CTGGGATCTG CC - #ATTGTCAG     2880     - ACATGTATAC CCCGTACGTC TTCCCGAGCG AAAACGGTCT GCGCTGCGGG AC - #GCGCGAAT     2940     - TGAATTATGG CCCACACCAG TGGCGCGGCG ACTTCCAGTT CAACATCAGC CG - #CTACAGTC     3000     - AACAGCAACT GATGGAAACC AGCCATCGCC ATCTGCTGCA CGCGGAAGAA GG - #CACATGGC     3060     - TGAATATCGA CGGTTTCCAT ATGGGGATTG GTGGCGACGA CTCCTGGAGC CC - #GTCAGTAT     3120     - CGGCGGATTC CAGCTGAGCG CCGGTCGCTA CCATTACCAG TTGGTCTGGT GT - #CAAAAATA     3180     - ATAATAACCG GGCAGGCCAT GTCTGCCCGT ATTTCGCGTA AGGAAATCCA TT - #ATGTACTA     3240     - TTTAAAAAAC ACAAACTTTT GGATGTTCGG TTTATTCTTT TTCTTTTACT TT - #TTTATCAT     3300     - GGGAGCCTAC TTCCCGTTTT TCCCGATTTG GCTACATGAC ATCAACCATA TC - #AGCAAAAG     3360     - TGATACGGGT ATTATTTTTG CCGCTATTTC TCTGTTCTCG CTATTATTCC AA - #CCGCTGTT     3420     - TGGTCTGCTT TCTGACAAAC TCGGGCTGCG CAAATACCTG CTGTGGATTA TT - #ACCGGCAT     3480     - GTTAGTGATG TTTGCGCCGT TCTTTATTTT TATCTTCGGG CCACTGTTAC AA - #TACAACAT     3540     - TTTAGTAGGA TCGATTGTTG GTGGTATTTA TCTAGGCTTT TGTTTTAACG CC - #GGTGCGCC     3600     - AGCAGTAGAG GCATTTATTG AGAAAGTCAG CCGTCGCAGT AATTTCGAAT TT - #GGTCGCGC     3660     - GCGGATGTTT GGCTGTGTTG GCTGGGCGCT GTGTGCCTCG ATTGTCGGCA TC - #ATGTTCAC     3720     - CATCAATAAT CAGTTTGTTT TCTGGCTGGG CTCTGGCTGT GCACTCATCC TC - #GCCGTTTT     3780     - ACTCTTTTTC GCCAAAACGG ATGCGCCCTC TTCTGCCACG GTTGCCAATG CG - #GTAGGTGC     3840     - CAACCATTCG GCATTTAGCC TTAAGCTGGC ACTGGAACTG TTCAGACAGC CA - #AAACTGTG     3900     - GTTTTTGTCA CTGTATGTTA TTGGCGTTTC CTGCACCTAC GATGTTTTTG AC - #CAACAGTT     3960     - TGCTAATTTC TTTACTTCGT TCTTTGCTAC CGGTGAACAG GGTACGCGGG TA - #TTTGGCTA     4020     - CGTAACGACA ATGGGCGAAT TACTTAACGC CTCGATTATG TTCTTTGCGC CA - #CTGATCAT     4080     - TAATCGCATC GGTGGGAAAA ACGCCCTGCT GCTGGCTGGC ACTATTATGT CT - #GTACGTAT     4140     - TATTGGCTCA TCGTTCGCCA CCTCAGCGCT GGAAGTGGTT ATTCTGAAAA CG - #CTGCATAT     4200     - GTTTGAAGTA CCGTTCCTGC TGGTGGGCTG CTTTAAATAT ATTACCAGCC AG - #TTTGAAGT     4260     - GCGTTTTTCA GCGACGATTT ATCTGGTCTG TTTCTGCTTC TTTAAGCAAC TG - #GCGATGAT     4320     - TTTTATGTCT GTACTGGCGG GCAATATGTA TGAAAGCATC GGTTTCCAGG GC - #GCTTATCT     4380     - GGTGCTGGGT CTGGTGGCGC TGGGCTTCAC CTTAATTTCC GTGTTCACGC TT - #AGCGGCCC     4440     - CGGCCCGCTT TCCCTGCTGC GTCGTCAGGT GAATGAAGTC GCTTAAGCAA TC - #AATGTCGG     4500     - ATGCGGCGCG ACGCTTATCC GACCAACATA TCATAACGGA GTGATCGCAT TG - #AACATGCC     4560     - AATGACCGAA AGAATAAGAG CAGGCAAGCT ATTTACCGAT ATGTGCGAAG GC - #TTACCGGA     4620     - AAAAAGACTT CGTGGGAAAA CGTTAATGTA TGAGTTTAAT CACTCGCATC CA - #TCAGAAGT     4680     - TGAAAAAAGA GAAAGCCTGA TTAAAGAAAT GTTTGCCACG GTAGGGGAAA AC - #GCCTGGGT     4740     - AGAACCGCCT GTCTATTTCT CTTACGGTTC CAACATCCAT ATAGGCCGCA AT - #TTTTATGC     4800     - AAATTTCAAT TTAACCATTG TCGATGACTA CACGGTAACA ATCGGTGATA AC - #GTACTGAT     4860     - TGCACCCAAC GTTACTCTTT CCGTTACGGG ACACCCTGTA CACCATGAAT TG - #AGAAAAAA     4920     - CGGCGAGATG TACTCTTTTC CGATAACGAT TGGCAATAAC GTCTGGATCG GA - #AGTCATGT     4980     - GGTTATTAAT CCAGGCGTCA CCATCGGGGA TAATTCTGTT ATTGGCGCGG GT - #AGTATCGT     5040     - CACAAAAGAC ATTCCACCAA ACGTCGTGGC GGCTGGCGTT CCTTGTCGGG TT - #ATTCGCGA     5100     - AATAAACGAC CGGGATAAGC ACTATTATTT CAAAGATTAT AAAGTTGAAT CG - #TCAGTTTA     5160     - AATTATAAAA ATTGCCTGAT ACGCTGCGCT TATCAGGCCT ACAAGTTCAG CG - #ATCTACAT     5220     - TAGCCGCATC CGGCATGAAC AAAGCGCAGG AACAAGCGTC GCATCATGCC TC - #TTTGACCC     5280     - ACAGCTGCGG AAAACGTACT GGTGCAAAAC GCAGGGTTAT GATCATCAGC CC - #AACGACGC     5340     - ACAGCGCATG AAATGCCCAG TCCATCAGGT AATTGCCGCT GATACTACGC AG - #CACGCCAG     5400     - AAAACCACGG GGCAAGCCCG GCGATGATAA AACCGATTCC CTGCATAAAC GC - #CACCAGCT     5460     - TGCCAGCAAT AGCCGGTTGC ACAGAGTGAT CGAGCGCCAG CAGCAAACAG AG - #CGGAAACG     5520     - CGCCGCCCAG ACCTAACCCA CACACCATCG CCCACAATAC CGGCAATTGC AT - #CGGCAGCC     5580     - AGATAAAGCC GCAGAACCCC ACCAGTTGTA ACACCAGCGC CAGCATTAAC AG - #TTTGCGCC     5640     - GATCCTGATG GCGAGCCATA GCAGGCATCA GCAAAGCTCC TGCGGCTTGC CC - #AAGCGTCA     5700     - TCAATGCCAG TAAGGAACCG CTGTACTGCG CGCTGGCACC AATCTCAATA TA - #GAAAGCGG     5760     - GTAACCAGGC AATCAGGCTG GCGTAACCGC CGTTAATCAG ACCGAAGTAA AC - #ACCCAGCG     5820     - TCCACGCGCG GGGAGTGAAT ACCACGCGAA CCGGAGTGGT TGTTGTCTTG TG - #GGAAGAGG     5880     - CGACCTCGCG GGCGCTTTGC CACCACCAGG CAAAGAGCGC AACAACGGCA GG - #CAGCGCCA     5940     - CCAGGCGAGT GTTTGATACC AGGTTTCGCT ATGTTGAACT AACCAGGGCG TT - #ATGGCGGC     6000     - ACCAAGCCCA CCGCCGCCCA TCAGAGCCGC GGACCACAGC CCCATCACCA GT - #GGCGTGCG     6060     - CTGCTGAAAC CGCCGTTTAA TCACCGAAGC ATCACCGCCT GAATGATGCC GA - #TCCCCACC     6120     - CCACCAAGCA GTGCGCTGCT AAGCAGCAGC GCACTTTGCG GGTAAAGCTC AC - #GCATCAAT     6180     - GCACCGACGG CAATCAGCAA CAGACTGATG GCGACACTGC GACGTTCGCT GA - #CATGCTGA     6240     - TGAAGCCAGC TTCCGGCCAG CGCCAGCCCG CCCATGGTAA CCACCGGCAG AG - #CGGTCGAC     6300     - CCGGACGGGA CGCTCCTGCG CCTGATACAG AACGAATTGC TTGCAGGCAT CT - #CATGAGTG     6360     - TGTCTTCCCG TTTTCCGCCT GAGGTCACTG CGTGGATGGA GCGCTGGCGC CT - #GCTGCGCG     6420     - ACGGCGAGCT GCTCACCACC CACTCGAGCT GGATACTTCC CGTCCGCCAG GG - #GGACATGC     6480     - CGGCGATGCT GAAGGTCGCG CGCATTCCCG ATGAAGAGGC CGGTTACCGC CT - #GTTGACCT     6540     - GGTGGGACGG GCAGGGCGCC GCCCGAGTCT TCGCCTCGGC GGCGGGCGCT CT - #GCTCATGG     6600     - AGCGCGCGTC CGGGGCCGGG GACCTTGCAC AGATAGCGTG GTCCGGCCAG GA - #CGACGAGG     6660     - CTTGCAGGAT CTATGATTCC CTTTGTCAAC AGCAATGGAT CACTGAAAAT GG - #TTCAATGA     6720     - TCACATTAAG TGGTATTCAA TATTTTCATG AAATGGGAAT TGACGTTCCT TC - #CAAACATT     6780     - CACGTAAAAT CTGTTGTGCG TGTTTAGATT GGAGTGAACG CCGTTTCCAT TT - #AGGTGGGT     6840     - ACGTTGGAGC CGCATTATTT TCGCTTTATG AATCTAAAGG GTGGTTAACT CG - #ACATCTTG     6900     - GTTACCGTGA AGTTACCATC ACGGAAAAAG GTTATGCTGC TTTTAAGACC CA - #CTTTCACA     6960     - TTTAAGTTGT TTTTCTAATC CGCATATGAT CAATTCAAGG CCGAATAAGA AG - #GCTGGCTC     7020     - TGCACCTTGG TGATCAAATA ATTCGATAGC TTGTCGTAAT AATGGCGGCA TA - #CTATCAGT     7080     - AGTAGGTGTT TCCCTTTCTT CTTTAGCGAC TTGATGCTCT TGATCTTCCA AT - #ACGCAACC     7140     - TAAAGTAAAA TGCCCCACAG CGCTGAGTGC ATATAATGCA TTCTCTAGTG AA - #AAACCTTG     7200     - TTGGCATAAA AAGGCTAATT GATTTTCGAG AGTTTCATAC TGTTTTTCTG TA - #GGCCGTGT     7260     - ACCTAAATGT ACTTTTGCTC CATCGCGATG ACTTAGTAAA GCACATCTAA AA - #CTTTTAGC     7320     - GTTATTACGT AAAAAATCTT GCCAGCTTTC CCCTTCTAAA GGGCAAAAGT GA - #GTATGGTG     7380     - CCTATCTAAC ATCTCAATGG CTAAGGCGTC GAGCAAAGCC CGCTTATTTT TT - #ACATGCCA     7440     - ATACAATGTA GGCTGCTCTA CACCTAGCTT CTGGGCGAGT TTACGGGTTG TT - #AAACCTTC     7500     - GATTCCGACC TCATTAAGCA GCTCTAATGC GCTGTTAATC ACTTTACTTT TA - #TCTAATCT     7560     - AGACATCATT AATTCCTAAT TTTTGTTGAC ACTCTATCAT TGATAGAGTT AT - #TTTACCAC     7620     - TCCCTATCAG TGATAGAGAA AAGTGAAATG AATAGTTCGA CAAAGATCGC AT - #TGGTAATT     7680     - ACGTTACTCG ATGCCATGGG GATTGGCCTT ATCATGCCAG TCTTGCCAAC GT - #TATTACGT     7740     - GAATTTATTG CTTCGGAAGA TATCGCTAAC CACTTTGGCG TATTGCTTGC AC - #TTTATGCG     7800     - TTAATGCAGG TTATCTTTGC TCCTTGGCTT GGAAAAATGT CTGACCGATT TG - #GTCGGCGC     7860     - CCAGTGCTGT TGTTGTCATT AATAGGCGCA TCGCTGGATT ACTTATTGCT GG - #CTTTTTCA     7920     - AGTGCGCTTT GGATGCTGTA TTTAGGCCGT TTGCTTTCAG GGATCACAGG AG - #CTACTGGG     7980     - GCTGTCGCGG CATCGGTCAT TGCCGATACC ACCTCAGCTT CTCAACGCGT GA - #AGTGGTTC     8040     - GGTTGGTTAG GGGCAAGTTT TGGGCTTGGT TTAATAGCGG GGCCTATTAT TG - #GTGGTTTT     8100     - GCAGGAGAGA TTTCACCGCA TAGTCCCTTT TTTATCGCTG CGTTGCTAAA TA - #TTGTCACT     8160     - TTCCTTGTGG TTATGTTTTG GTTCCGTGAA ACCAAAAATA CACGTGATAA TA - #CAGATACC     8220     - GAAGTAGGGG TTGAGACGCA ATCGAATTCG GTATACATCA CTTTATTTAA AA - #CGATGCCC     8280     - ATTTTGTTGA TTATTTATTT TTCAGCGCAA TTGATAGGCC AAATTCCCGC AA - #CGGTGTGG     8340     - GTGCTATTTA CCGAAAATCG TTTTGGATGG AATAGCATGA TGGTTGGCTT TT - #CATTAGCG     8400     - GGTCTTGGTC TTTTACACTC AGTATTCCAA GCCTTTGTGG CAGGAAGAAT AG - #CCACTAAA     8460     - TGGGGCGAAA AAACGGCAGT ACTGCTCGAA TTTATTGCAG ATAGTAGTGC AT - #TTGCCTTT     8520     - TTAGCGTTTA TATCTGAAGG TTGGTTAGAT TTCCCTGTTT TAATTTTATT GG - #CTGGTGGT     8580     - GGGATCGCTT TACCTGCATT ACAGGGAGTG ATGTCTATCC AAACAAAGAG TC - #ATGAGCAA     8640     - GGTGCTTTAC AGGGATTATT GGTGAGCCTT ACCAATGCAA CCGGTGTTAT TG - #GCCCATTA     8700     - CTGTTTACTG TTATTTATAA TCATTCACTA CCAATTTGGG ATGGCTGGAT TT - #GGATTATT     8760     - GGTTTAGCGT TTTACTGTAT TATTATCCTG CTATCGATGA CCTTCATGTT AA - #CCCCTCAA     8820     - GCTCAGGGGA GTAAACAGGA GACAAGTGCT TAGTTATTTC GTCACCAAAT GA - #TGTTATTC     8880     - CGCGAAATAT AATGACCCTC TTGATAACCC AAGAGGGCAT TTTTTACGAT AA - #AGAAGATT     8940     - TAGCTTCAAA TAAAACCTAT CTATTTTATT TATCTTTCAA GCTCAATAAA AA - #GCCGCGGT     9000     - AAATAGCAAT AAATTGGCCT TTTTTATCGG CAAGCTCTTT TAGGTTTTTC GC - #ATGTATTG     9060     - CGATATGCAT AAACCAGCCA TTGAGTAAGT TTTTAAGCAC ATCACTATCA TA - #AGCTTTAA     9120     - GTTGGTTCTC TTGGATCAAT TTGCTGACAA TGGCGTTTAC CTTACCAGTA AT - #GTATTCAA     9180     - GGCTAATTTT TTCAAGTTCA TTCCAACCAA TGATAGGCAT CACTTCTTGG AT - #AGGGATAA     9240     - GGTTTTTATT ATTATCAATA ATATAATCAA GATAATGTTC AAATATACTT TC - #TAAGGCAG     9300     - ACCAACCATT TGTTAAATCA GTTTTTGTTG TGATGTAGGC ATCAATCATA AT - #TAATTGCT     9360     - GCTTATAACA GGCACTGAGT AATTGTTTTT TATTTTTAAA GTGATGATAA AA - #GGCACCTT     9420     - TGGTCACCAA CGCTTTTCCC GAGATCCTCT GCGACACCGC CGCTCGTCTG CA - #CGCGCCGC     9480     - GGTCCGGACC GCCGCCCGAT CTCCATCCGC TACAGGAATG GTTCCAGCCG CT - #TTTCCGGT     9540     - TGGCCGCTGA GCACGCGGCA CTTGCGCCCG CCGCCAGCGT AGCGCGCCAA CT - #TCTGGCGG     9600     - CGCCGCGCGA GGTGTGCCCG CTCCACGGCG ACCTGCACCA CGAGAACGTG CT - #CGACTTCG     9660     - GCGACCGCGG CTGGCTGGCC ATCGACCCGC ACGGACTGCT CGGCGAGCGC AC - #CTTCGACT     9720     - ATGCCAACAT CTTCACGAAT CCCGATCTCA GCGACCCCGG TCGCCCGCTT GC - #GATCCTGC     9780     - CGGGCAGGCT GGAGGCTCGA CTCAGCATTG TGGTCGCGAC GACCGGGTTT GA - #GCCCGAAC     9840     - GGCTTCTTCG CTGGATCATT GCATGGACGG GCTTGTCGGC AGCCTGGTTC AT - #CGGCGACG     9900     - GCGACGGCGA GGGCGAGGGC GCTGCGATTG ATCTGGCCGT AAACGCCATG GC - #ACGCCGGT     9960     - TGCTTGACTA GCGCGGTCAC CGATCTCACC TGGTCGTCGA GCTAGGTCAG GC - #CGTGTCGG     10020     - GCGTGATCCG CTGGAAGTCG TTGCGGGCCA CACCCGCCGC CTCGAAGCCC TG - #CACCAGGC     10080     - CGGCATCGTG GTGTGCGTGG CCGAGGGACT ATGGAAGGTG CCGGACGATC TG - #CCCGAGCA     10140     - GGGCCGCCGC TATGACGCCC AGCGTCTTGG TGGCGTGACG GTGGAGCTGA AA - #TCGCACCT     10200     - GCCCATCGAG CGGCAGGCCC GCGTGATCGG TGCCACCTGG CTTGACCAGC AG - #TTGATCGA     10260     - CGGTGGCTCG GGCTTGGGCG ACCTGGGCTT TAGCAGTGAG GCCAAGTAGG CG - #ATACAGCA     10320     - GCGCGCGGAC TTCCTGGCCG AACAGGGACT GGCCGAGCGG CGCGGGCAGC GC - #GTGATCCT     10380     - CACCGGAATC TGCTGGGCAG CAGCGGGCTC GGGAACTGGC GCAGGCCGCG AA - #GGACATTG     10440     - CCGCCGATAC CGGCCTGGAG CATCGCCCCG TGGCCGACGG CCAGCGCGTT GC - #CGGCGTCT     10500     - ACCGGCGCCC CGTCATGCTC GCCAGCGGGC GAAATGGGAT GCTTGATGAC GC - #CAAGGGGT     10560     - CCAGCCTCGT GCGGTGGAAG CCCATCGAAC AGCGGCTTGG GGAGCAGCTC GC - #CGCGACGG     10620     - TGCGCGGTGG CGGCGTGTCT TGGGAGATTG GACGACAGCG TGGGCCGGCC CC - #TGTCTCTT     10680     - GATCAGATCT TGATCCCCTG CGCCATCAGA TCCTTGGCGG CAAGAAAGCC AT - #CCAGTTTA     10740     - CTTTGCAGGG CTTCCCAACC TTCCCAGAGG GCGCCCCAGC TGGCAATTCC GG - #TTCGCTTG     10800     - CTGTCCATAA AACCGCCCAG TCTAGCTATC GCCATGTAAG CCCACTGCAA GC - #TACCTGCT     10860     - TTCTCTTTGC GCTTGCGTTT TCCCTTGTCC AGATAGCCCA GTAGCTGACA TT - #CATCCGGG     10920     - GTCAGCACCG TTTCTGCGGA CTGGCTTTCT ACGTGTTCCG CTTCCTTTAG CA - #GCCCTTGC     10980     - GCCCTGAGTG CTTGCGGCAG CGTGAAGCTT TCTCTGAGCT GTAACAGCCT GA - #CCGCAACA     11040     - AACGAGAGGA TCGAGACCAT CCGCTCCAGA TTATCCGGCT CCTCCATGCG TT - #GCCTCTCG     11100     - GCTCCTGCTC CGGTTTTCCA TGCCTTATGG AACTCCTCGA TCCGCCAGCG AT - #GGGTATAA     11160     - ATGTCGATGA CGCGCAAGGC TTGGGCTAGC GACTCGACCG GTTCGCCGGT CA - #GCAACAAC     11220     - CATTTCAACG GGGTCTCACC CTTGGGCGGG TTAATCTCCT CGGCCAGCAC CG - #CGTTGAGC     11280     - GTGATATTCC CCTGTTTTAG CGTGATGCGC CCACTGCGCA GGCTCAAGCT CG - #CCTTGCGG     11340     - GCTGGTCGAT TTTTACGTTT ACCGCGTTTA TCCACCACGC CCTTTTGCGG AA - #TGCTGATC     11400     - TGATAGCCAC CCAACTCCGG TTGGTTCTTC AGATGGTCGA TCAGATACAA CC - #CAGACTCT     11460     - ACGTCCTTGC GTGGGTGCTT GGAGCGCACC ACGAAGCGCT CGTTATGCGC CA - #GCCTGTCC     11520     - TGCAGATAAG CATGAATATC GGCTTCGCGG TCACAGACCG CAATCACGTT GC - #TCATCATG     11580     - CTGCCCATGC GTAACCGGCT AGTTGCGGCC GCTGCCAGCC ATTTGCCACT CT - #CCTTTTCA     11640     - TCCGCATCGG CAGGGTCATC CGGGCGCATC CACCACTCCT GATGCAGTAA TC - #CTACGGTG     11700     - CGGAATGTGG TGGCCTCGAG CAAGAGAACG GAGTGAACCC ACCATCCGCG GG - #ATTTATCC     11760     - TGAATAGAGC CCAGCTTGCC AAGCTCTTCG GCGACCTGGT GGCGATAACT CA - #AAGAGGTG     11820     - GTGTCCTCAA TGGCCAGCAG TTCGGGAAAC TCCTGAGCCA ACTTGACTGT TT - #GCATGGCG     11880     - CCAGCCTTTC TGATCGCCTC GGCAGAAACG TTGGGATTGC GGATAAATCG GT - #AAGCGCCT     11940     - TCCTGCATGG CTTCACTACC CTCTGATGAG ATGGTTATTG ATTTACCAGA AT - #ATTTTGCC     12000     - AATTGGGCGG CGACGTTAAC CAAGCGGGCA GTACGGCGAG GATCACCCAG CG - #CCGCCGAA     12060     - GAGAACACAG ATTTAGCCCA GTCGGCCGCA CGATGAAGAG CAGAAGTTAT CA - #TGAACGTT     12120     - ACCATGTTAG GAGGTCACAT GGAAGATCAG ATCCTGGAAA ACGGGAAAGG TT - #CCGTTCGA     12180     - ATTGCATGCG GATCCGGGAT CAAGATCTGA TCAAGAGACA GGTACCAATT GT - #TGAAGACG     12240     - AAAGGGCCTC GTGATACGCC TATTTTTATA GGTTAATGTC ATGATAATAA TG - #GTTTCTTA     12300     - GACGTCAGGT GGCACTTTTC GGGGAAATGT GCGCGGAACC CCTATTTGTT TA - #TTTTTCTA     12360     - AATACATTCA AATATGTATC CGCTCATGAG ACAATAACCC TGATAAATGC TT - #CAATAATA     12420     - TTGAAAAAGG AAGAGTATGA GTATTCAACA TTTCCGTGTC GCCCTTATTC CC - #TTTTTTGC     12480     - GGCATTTTGC CTTCCTGTTT TTGCTCACCC AGAAACGCTG GTGAAAGTAA AA - #GATGCTGA     12540     - AGATCAGTTG GGTGCACGAG TGGGTTACAT CGAACTGGAT CTCAACAGCG GT - #AAGATCCT     12600     - TGAGAGTTTT CGCCCCGAAG AACGTTTTCC AATGATGAGC ACTTTTAAAG TT - #CTGCTATG     12660     - TGGCGCGGTA TTATCCCGTG TTGACGCCGG GCAAGAGCAA CTCGGTCGCC GC - #ATACACTA     12720     - TTCTCAGAAT GACTTGGTTG AGTACTTGGC AAACTGATCT AAATGTTTAG CC - #CAGTCATC     12780     - ATACTTCACC GATGCCAACG CATTAAAAAT AGCATCACGA TCGGCTTTGC TG - #AATTTCTT     12840     - ATTTAAAACA TCCTTGTATT TTTCAAAAGC AGCGAGAGCT TCATTCACAT TG - #CCGATTTT     12900     - CTTACCTTTA GACTTATCAG CAAGTTCCTG TGCCATTTTC GAATATTTTT CA - #CCATATTT     12960     - TTCAGTCAGC GTTTGATAAA AGCTAACTGT TGCATCAACA GCATCCTTAA TC - #TGTGAATT     13020     - AAGGAGATTA TTCTGTGCTT TTTTCAAATT TTCTTCAGCT TCATGAACAC GA - #GCGATACC     13080     - GGCATTACGA TTATTACTGA CCTGAGAAAT AGCCTTCTGG ATCTGAGTTA TA - #TCAGCATT     13140     - TATCCGGTTA ATACGTGTTT CTGATGCTGT TACCTGTTTT TGTTTTTCTT CT - #CTAATCTT     13200     - ACCGGCCCCA ACCCGTCGTC TGGTTGCTTC AAAAAAAGGA CGGTTCTGAA GC - #GGATCATT     13260     - GGCTCTTGGT GATAGTTTTT TGACCAGCTC ATCCAGTTCT TTATATTTAG CG - #GATGCCTG     13320     - AGCCAGTTCA TTTCGTTTTC CAGCGAGCGT TTTCATTTCT GCATCACGGG CA - #TGGATACT     13380     - GGAGCTTAAA CGAGAATTGA GAGTCTTAAT CTCTCCATCC ATTTTCACCA CT - #TCAGATTG     13440     - TGCAGCAGAA AGTTTTTTTT GGGCGATCTC AACAGCTTTA GCTTCTTCAC TC - #AATGCAGC     13500     - CAGTCGTTTC TCTTCAGCTT CAGCCAGTTT CAACTGGCGT TCTGTTTCAG CC - #TTCTCCCG     13560     - TTCAATCTCT TTACGTCGTT GTTCTGCTTC CTGAAAAGCC TTTTCTGCTG CT - #TCCGCTTC     13620     - TTTACGGGCT TTTTCTTCTG CTTTCGCAAG GCGCAAACGC TCTGCTTCCG CC - #TGCATAGC     13680     - TGCATTATTA GCATGAGCAA GCTCTGTTGC TGAAGGCGTA CGTGAGGCAT TG - #TGACGAAG     13740     - AGCCTCATTC ACGATATCCT TCAGGCGCTG AGTCAGCGCA TCCCTGTTTG CC - #TTTGCTTT     13800     - CGCCTGTGCT TCCGCTGCAG CTTTTGCCCG GGCAGCCTGC TCTGCCTGTG TT - #TTCTTTAA     13860     - TTGAGCAGTA GACCATTTAG CAGTTGCATG AATAGCTGCA GAACTTTCAC TT - #TTACTGCC     13920     - TCCTTTTCCA CCTCCGCCGC CAGAGCCACT CCCGTCAGGA GTACCATTCA AA - #AGAGTAAT     13980     - AATTACCTGT CCCTTATCAT CATAAGGAAC ACCATCTTTA TAGTACGCTA CC - #GCGGTTTC     14040     - CATTATAAAA TCCTCTTTGA CTTTTAAAAC AATAAGTTAA AAATAAATAC TG - #TACATATA     14100     - ACCACTGGTT TTATATACAG CATAAAAGCT ACGCCGCTGC ATTTTCCCTG TC - #AAGACTGT     14160     - GGACTTCCAT TTTTGTGAAA ACGATCAAAA AAACAGTCTT TCACACCACG CG - #CTATTCTC     14220     - GCCCGATGCC ACAAAAACCA GCACAAACAT TACCGTTCTC AGACCTCATT AT - #GTTTTACT     14280     - GAAACTATGA GATGAGACAT CTATGGGACA CTGTCACTTT ATGGCATGGC AC - #ACACTCCG     14340     - GGACGCACTA AAAATGACAG GCAGATCGCG TTCACAGTTT TACCGTGATA TG - #CGCGGAGG     14400     - CCTTGTCAGT TACCGTACCG GCAGGGACGG ACGACGGGAG TTTGAAACCA GT - #GAACTGAT     14460     - CCGGGCATAC GGCGAATTAA AGCAGAATGA GACACCAGAA AGGCACAGTG AG - #GGACATGC     14520     - AGAAAATCCA CATGATCAGC AGACAGAACG CATTCTCCGG GAACTGAATG AG - #CTGAAACA     14580     - ATGCCTGACG CTGATGCTTG AGGATAAACA GGCACAGGAT ATGGATCGCA GA - #CGCCAGGA     14640     - AGCAGAACGG GAACAGCTAC AAAATGAGAT AGCCCAGCTC AGGCAGGCAC TG - #GAACTGGA     14700     - AAAGAAACGG GGATTCTGGT CCAGGTTGTT CGGTCGCTGA ACGCTGTCAG AG - #ACTGATGA     14760     - TAAAATAGTC TTCGGATAAT AACTCACCGA GAATAAATAC TTTAAGGTAG GG - #AGACACTC     14820     - ATGAGACGTA CCGGAAACAA ACTTTGTCTT ATCGCCATGA TAACAGCAAC AG - #TAGCTCTC     14880     - ACAGCCTGTA CCCCAAAGGG CAGCGTGGAA CAACATACCC GGCATTACGT AT - #ATGCTTCT     14940     - GATGACGGTT TTGATCCCAA CTTTTCCACC CAAAAAGCCG ACACAACACG AA - #TGATGGTG     15000     - CCTTTTTTTC GGCAGTTCTG GGATATGGGA GCTAAAGACA AAGCGACAGG AA - #AATCACGG     15060     - AGTGATGTGC AACAACGCAT TCAGCAGTTT CACAGCCAAG AATTTTTAAA CT - #CACTCCGG     15120     - GGCACAACTC AATTTGCGGG TACTGATTAC CGCAGCAAAG ACCTTACCCC GA - #AAAAATCC     15180     - AGGCTGCTGG CTGACACGAT TTCTGCGGTT TATCTCGATG GCTACGAGGG CA - #GACAGTAA     15240     - GTGGATTTAC CATAATCCCT TAATTGTACG CACCGCTAAA ACGCGTTCAG CG - #CGATCACG     15300     - GCAGCAGACA GGTAAAAATG GCAACAAACC ACCCTAAAAA CTGCGCGATC GC - #GCCTGATA     15360     - AATTTTAACC GTATGAATAC CTATGCAACC AGAGGGTACA GGCCACATTA CC - #CCCACTTA     15420     - ATCCACTGAA GCTGCCATTT TTCATGGTTT CACCATCCCA GCGAAGGGCC AT - #CCAGCGTG     15480     - CGTTCCTGTA TTTCCGGCTG ACGCTCCCGT TCTAGGGATA ACACATGTTC GC - #GCTCCTGT     15540     - ATCAGCCGTT CCTCTCTTAT CTCCAGTTCT CGCTGTATAA CTGGCTCAAG CG - #TTCTGTCT     15600     - GCTCGCTCAA GTGTTGCACC TGCTGACTCA ACTGCATGAC CCGCTCGTTC AG - #CATCGCGT     15660     - TGTCCCGTTG CGTAAGCGAA AACATCTTCT GCAATTCCAC GAAGGCGCTC TC - #CCATTCGC     15720     - TCAGCCGCTG CATATAGTCC TGTTGCAGCT GCTCTAAGGC GTTCAGCAAA TG - #TGTTTCCA     15780     - GCTCTGTCAC TCTGTGTCAC TCCTTCAGAT GTACCCACTC TTTCCCCTGA AA - #GGGAATCA     15840     - CCTCCGCTGA TTTCCCGTAC GGAAGGACAA GGAATTTCCT GTTCCCGTCC TG - #CACAAACT     15900     - CCACGCCCCA TGTCTTCGCG TTCAGTTTCT GCAATGTCTC TTCCTGCTTC CT - #GATTTCTT     15960     - CCAGGTTCGC CTGTATCCTC CCTCCAAGAT ACCAGAGCGT CCCGCCACTC GC - #GGTAAACA     16020     - GGAGAAAGAC TATCCCCAGT AACATCATGC CCGTATTCCC TGCCAGCTTT AA - #CACGTCCC     16080     - TCCTGTGCTG CATCATCGCC TCTTTCACCC CTTCCCGGTG TTTTTCCAGC GA - #TTCCTCTG     16140     - TCGAGGCTGT GAACAGGGCT ATAGCGTCTC TGATTTTCGT CTCGTTTGAT GT - #CACAGCCT     16200     - CGCTTACAGA TTCGCCGAGC CTCCTGAACT CGTTGTTCAG CATTTTCTCT GT - #AGATTCGG     16260     - CTCTCTCTTT CAGCTTTTTC TCGAACTCCG CGCCCGTCTG CAAAAGATTG CT - #CATAAAAT     16320     - GCTCCTTTCA GCCTGATATT CTTCCCGCCG TTCGGATCTG CAATGCTGAT AC - #TGCTTCGC     16380     - GTCACCCTGA CCACTTCCAG CCCCGCCTCA GTGAGCGCCT GAATCACATC CT - #GACGGCCT     16440     - TTTATCTCTC CGGCATGGTA AAGTGCATCT ATACCTCGCG TGACGCCCTC AG - #CAAGCGCC     16500     - TGTTTCGTTT CAGGCAGGTT ATCAGGGAGT GTCAGCGTCC TGCGGTTCTC CG - #GGGCGTTC     16560     - GGGTCATGCA GCCCGTAATG GTGATTTAAC AGCGTCTGCC AAGCATCAAT TC - #TAGGCCTG     16620     - TCTGCGCGGT CGTAGTACGG CTGGAGGCGT TTTCCGGTCT GTAGCTCCAT GT - #TCGGAATG     16680     - ACAAAATTCA GCTCAAGCCG TCCCTTGTCC TGGTGCTCCA CCCACAGGAT GC - #TGTACTGA     16740     - TTTTTTTCGA GACCGGGCAT CAGTACACGC TCAAAGCTCG CCATCACTTT TT - #CACGTCCT     16800     - CCCGGCGGCA GCTCCTTCTC CGCGAACGAC AGAACACCGG ACGTGTATTT CT - #TCGCAAAT     16860     - GGCGTGGCAT CGATGAGTTC CCGGACTTCT TCCGGTATAC CCTGAAGCAC CG - #TTGCGCCT     16920     - TCGCGGTTAC GCTCCCTCCC CAGCAGGTAA TCAACCGGAC CACTGCCACC AC - #CTTTTCCC     16980     - CTGGCATGAA ATTTAACTAT CATCCCGCGC CCCCTGTTCC CTGACAGCCA GA - #CGCAGCCG     17040     - GCGCAGCTCA TCCCCGATGG CCATCAGTGC GGCCACCACC TGAACCCGGT CA - #CCGGAAGA     17100     - CCACTGCCCG CTGTTCACCT TACGGGCTGT CTGATTCAGG TTATTTCCGA TG - #GCGGCCAG     17160     - CTGACGCAGT AACGGCGGTG CCAGTGTCGG CAGTTTTCCG GAACGGGCAA CC - #GGCTCCCC     17220     - CAGGCAGACC CGCCGCATCC ATACCGCCAG TTGTTTACCC TCACAGCGTT CA - #AGTAACCG     17280     - GGCATGTTCA TCATCAGTAA CCCGTATTGT GAGCATCCTC TCGCGTTTCA TC - #GGTATCAT     17340     - TACCCCATGA ACAGAAATCC CCCTTACACG GAGGCATCAG TGACTAAACA GG - #AAAAAACC     17400     - GCCCTTAACA TGGCCCGCTT TATCAGAAGC CAGACATTAA CGCTGCTGGA GA - #AGCTCAAC     17460     - GAACTGGACG CAGATGAACA GGCCGATATT TGTGAATCGC TTCACGACCA CG - #CCGATGAG     17520     - CTTTACCGCA GCTGCCTCGC ACGTTTCGGG GATGACGGTG AAAACCTCTG AC - #ACATGCAG     17580     - CTCCCGGAGA CGGTCACAGC TTGTCTGTGA GCGGATGCCG GGAGCTGACA AG - #CCCGTCAG     17640     - GGCGCGTCAG CAGGTTTTAG CGGGTGTCGG GGCGCAGCCC TGACCCAGTC AC - #GTAGCGAT     17700     - AGCGGAGTGT ATACTGGCTT AACCATGCGG CATCAGTGCG GATTGTATGA AA - #AGTACGCC     17760     - ATGCCGGGTG TGAAATGCCG CACAGATGCG TAAGGAGAAA ATGCACGTCC AG - #GCGCTTTT     17820     - CCGCTTCCTC GCTCACTGAC TCGCTACGCT CGGTCGTTCG ACTGCGGCGA GC - #GGTACTGA     17880     - CTCACACAAA AACGGTAACA CAGTTATCCA CAGAATCAGG GGATAAGGCC GG - #AAAGAACA     17940     - TGTGAGCAAA AGACCAGGAA CAGGAAGAAG GCCACGTAGC AGGCGTTTTT CC - #ATAGGCTC     18000     - CGCCCCCCTG ACGAGCATCA CAAAAATAGA CGCTCAAGTC AGAGGTGGCG AA - #ACCCGACA     18060     - GGACTATAAA GCTACCAGGC GTTTCCCCCT GGAAGCTCCC TCGTGCGCTC TC - #CTGTTCCG     18120     - ACCCTGCCGC TTACCGGATA CCTGTCCGCC TTTCTCCCTT CGGGAAGCGT GG - #CGCTTTCT     18180     - CATAGCTCAC GCTGTTGGTA TCTCAGTTCG GTGTAGGTCG TTCGCTCCAA GC - #TGGGCTGT     18240     - GTGCACGAAC CCCCCGTTCA GCCCGACCGC TGCGCCTTAT CCGGTAACTA TC - #GTCTTGAG     18300     - TCCAACCCGG TAAGGCACGC CTTAACGCCA CTGGCAGCAG CCACTGGTAA CC - #GGATTAGC     18360     - AGAGCGATGA TGGCACAAAC GGTGCTACAG AGTTCTTGAA GTAGTGGCCC GA - #CTACGGCT     18420     - ACACTAGAAG GACAGTATTT GGTATCTGCG CTCTGCTGAA GCCAGTTACC TT - #CGGAAAAA     18480     - GAGTTGGTAG CTCTTGATCC GGCAAACAAA CCACCGTTGG TAGCGGTGGT TT - #TTTTGTTT     18540     - GCAAGCAGCA GATTACGCGC AGAAAAAAAG GATCTCAAGA AGATCCTTTA AT - #CTTTTCTA     18600     - CTGAACCGCG ATCCCCGTCA GTTTAGAAGA GGAGGATGGT GCGATGGTCC CT - #CCCTGAAC     18660     - ATCAGGTATA TAGTTAGCCT GACATCCAAC AAGGAGGTTT ATCGCGAATA TT - #CCCACAAA     18720     - AAATCTTTTC CTCATAACTC GATCCTTATA AAATGAAAAG AATATATGGC GA - #GGTTTAAT     18780     - TTATGAGCTT AAGATACTAC ATAAAAAATA TTTTATTTGG CCTGTACTGC AC - #ACTTATAT     18840     - ATATATACCT TATAACAAAA AACAGCGAAG GGTATTATTT CCTTGTGTCA GA - #TAAGATGC     18900     - TATATGCAAT AGTGATAAGC ACTATTCTAT GTCCATATTC AAAATATGCT AT - #TGAATACA     18960     - TAGCTTTTAA CTTCATAAAG AAAGATTTTT TCGAAAGAAG AAAAAACCTA AA - #TAACGCCC     19020     - CCGTAGCAAA ATTAAACCTA TTTATGCTAT ATAATCTACT TTGTTTGGTC CT - #AGCAATCC     19080     - CATTTGGATT GCTAGGACTT TTTATATCAA TAAAGAATAA TTAAATCCCT AA - #CACCTCAT     19140     #                 191 - #82TCAATAT AGGAGCATAG AA     __________________________________________________________________________ 

We claim:
 1. A system for transposing a transposable DNA sequence in vitro, the system comprising:a mutant Tn5 transposase modified relative to a wild type Tn5 transposase, the mutant transposase comprising a mutation at position 54, and a mutation at position 372, the mutant transposase having greater avidity for Tn5 outside end repeat sequences of a donor DNA and a lesser ability to form multimers than wild type Tn5 transposase; a donor DNA molecule comprising the transposable DNA sequence, the DNA sequence being flanked at its 5'- and 3'-ends by an 18 or 19 base pair flanking DNA sequence comprising nucleotide A at position 10, nucleotide T at position 11, and nucleotide A at position 12; and a target DNA molecule into which the transposable element can transpose.
 2. The system as claimed in claim 1 wherein the flanking sequence further comprises a nucleotide at position 4 selected from the group consisting of A or T.
 3. The system as claimed in claim 1 wherein the flanking sequence further comprises a nucleotide at position 15 selected from the group consisting of G or C.
 4. The system as claimed in claim 1 wherein the flanking sequence further comprises a nucleotide at position 17 selected from the group consisting of A or T.
 5. The system as claimed in claim 1 wherein the flanking sequence further comprises a nucleotide at position 18 selected from the group consisting of G or C.
 6. The system as claimed in claim 1 wherein the flanking sequence has the sequence 5'-CTGTCTCTTATACACATCT-3' (SEQ ID NO:8).
 7. The system as claimed in claim 1 wherein the flanking sequence has the sequence 5'-CTGTCTCTTATACAGATCT-3' (SEQ ID NO:9).
 8. A method for in vitro transposition, the method comprising the steps of:combining a donor DNA molecule that comprises a transposable DNA sequence of interest, the DNA sequence of interest being flanked at its 5'- and 3'-ends by an 18 or 19 base pair flanking DNA sequence comprising nucleotide A at position 10, nucleotide T at position 11, and nucleotide A at position 12, with a target DNA molecule and a mutant Tn5 transposase modified relative to wild type Tn5 transposase in a suitable reaction buffer at a temperature below a physiological temperature until the modified transposase binds to the outside end repeat sequences; and raising the temperature to a physiological temperature for a period of time sufficient for the enzyme to catalyze in vitro transposition, wherein the mutant transposase comprises a mutation at position 54 and a mutation at position 372, the mutant transposase having greater avidity for Tn5 outside end repeat sequences of a donor DNA and a lesser ability to form multimers than wild type Tn5 transposase.
 9. The system as claimed in claim 8 wherein the flanking sequence further comprises a nucleotide at position 4 selected from the group consisting of A or T.
 10. The system as claimed in claim 8 wherein the flanking sequence further comprises a nucleotide at position 15 selected from the group consisting of G or C.
 11. The system as claimed in claim 8 wherein the flanking sequence further comprises a nucleotide at position 17 selected from the group consisting of A or T.
 12. The system as claimed in claim 8 wherein the flanking sequence further comprises a nucleotide at position 18 selected from the group consisting of G or C.
 13. The system as claimed in claim 8 wherein the flanking sequence has the sequence 5'-CTGTCTCTTATACACATCT-3' (SEQ ID NO:8).
 14. The system as claimed in claim 8 wherein the flanking sequence has the sequence 5'-CTGTCTCTTATACAGATCT-3' (SEQ ID NO:9). 